Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bafaa365260087…

MALICIOUS

PDF

64.7 KB Created: 2020-08-12 09:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: acba19160a13bd9c499c4841b0c0567a SHA-1: d724bca2be49d12f84b6ef04ea63a625dcdd2d20 SHA-256: d5bafaa365260087b24229f7e646359414254796b1685dc68953bbdacdfea88e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary payload delivery mechanism. The document body text, though garbled, contains the phrase 'rapidex english speaking course pdf file', suggesting a lure for users seeking educational materials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=rapidex+english+speaking+course+pdf+file In PDF document text
    • http://files.myyearofhandmedowns.com/uploads/1/3/1/4/131454345/rebebad.pdfIn PDF document text
    • http://files.catholicsofpleasanton.org/uploads/1/3/1/4/131437225/fobonevixi_dojifikomotidir_rikutiberavukem_kopitu.pdfIn PDF document text
    • http://files.bydivineappointmentthe5ps.com/uploads/1/3/1/8/131856160/tobinelod.pdfIn PDF document text
    • http://files.ownbeachrentals.com/uploads/1/3/1/4/131406840/9534838.pdfIn PDF document text
    • http://files.deborahvandelden.com/uploads/1/3/0/8/130874526/9aaae248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/kulofimegiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/migijesidonew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/31955649659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/72085849674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/fefim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4490/files/86201573878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/jurassic_park_theme_song_trumpet_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41078692832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/book_bank_management_system_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/38792625714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/list_of_ethical_issues_in_business.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 5556 bytes
SHA-256: dd89e7898cdf19313fa04ec337ee3128db0eebf5a080ce22fc1e41dc132037e4
font_01_sfnt_off000090fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FD 2812 bytes
SHA-256: 4a43d1a26354d2a1e849213e37d6ed8a1fb70decbe72b19f414fbd1763437497
font_02_sfnt_off00009cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD8 15336 bytes
SHA-256: f75f154f4ee4d4a3687f8af8779e2062d509636f540539cf152bcc255926b5de
font_03_sfnt_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 16164 bytes
SHA-256: 967d89e51290aceb8fea09c2f9e0c707663cecf1a9b826b2128538f448fdbc28
font_04_sfnt_off0000e0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0ED 5412 bytes
SHA-256: 4091daf0aa9c1df05d60d6ac81ab26d69d22d23a5dccf7963fe73eca60aa97ae

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