Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d21695a8c95e14a…

MALICIOUS

PDF

55.3 KB Created: 2020-08-12 22:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da9f431a9d285aa9544a5c66901bd970 SHA-1: 6dd993a242ac333e31ebb85cfb068de206a907dd SHA-256: 1d21695a8c95e14ac1d9c942b16adb230f62053c6e08204e76faa54ea488d57c
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to 'ttraff.cc' disguised as a grammar book PDF. This indicates a link farm or phishing lure designed to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. 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=english+grammar+book+pdf+for+competitive+exam In PDF document text
    • http://files.bayoutalla.com/uploads/1/3/1/3/131378968/zedexi.pdfIn PDF document text
    • http://files.rentalmonsters.com/uploads/1/3/1/6/131606878/8870795.pdfIn PDF document text
    • http://files.tsxdesignhouse.com/uploads/1/3/1/4/131406558/topudixaxujas_gikezi_xofapipafu.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/1/0437/6916/8021/files/35001131728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/oblivion_horse_armor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9488/4000/files/nupokixibaveraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4561/5766/files/vabodotimatidarekinako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/the_new_oxford_annotated_apocrypha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/91983885176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/razuvarekitogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/61386555496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/power_system_reliability_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8251/4585/files/financial_accounting_mcq_questions_and_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDC 5856 bytes
SHA-256: 4429c29cfda688b7e8214ef2b965f3ffdbe6781ebe5c716cdab9a33d23735c83
font_01_sfnt_off000071a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A4 14468 bytes
SHA-256: d205623e946d4bd2f0c58346bd00026708abbde9134022234c6f2b53721043c7
font_02_sfnt_off00009e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E57 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_03_sfnt_off0000b3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AC 8476 bytes
SHA-256: 11819df538189f8e9aadee507bac7eff6f265dbc4d09acd788e1d91cb9113990

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