Malicious PDF — malware analysis report

Static analysis result for SHA-256 1724f589c233b66e…

MALICIOUS

PDF

33.6 KB Created: 2020-08-21 02:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4216514684929b941fdd16e516ac8706 SHA-1: a2c085d3103b357723132238de690923364a1f56 SHA-256: 1724f589c233b66eb4e9b4004f6e0c8af417491c38e30e7ee6b7c15ed9b63dbf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector. The document body, though heavily obfuscated, includes the same malicious URL and other links that appear to be part of an SEO link farm, suggesting an attempt to disguise malicious activity. The ML classifier strongly indicates maliciousness, and the presence of a redirector points towards a phishing or malware distribution scheme.

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=carrier+aircon+inverter+split+type+manual In PDF document text
    • http://vitejiv.djspeaking.com/uploads/1/3/1/4/131409090/43e59322a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1361/5264/files/caller_id_location_tracker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/vision_ias_current_affairs_may_2020_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/48005398372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/lides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/8817/9353/files/building_design_and_drawing_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/kinetezeduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/ms_access_vba_tutorial_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/vekabomijapojekasom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/39957377411.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000476e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x476E 5148 bytes
SHA-256: 6318fdbbce5a7a7e35d4923d5f4b292cf89ca4306a86810cca796ff5feb0da35
font_01_sfnt_off000058e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58E2 9676 bytes
SHA-256: 4721f7da5281a1fdd531596990ceec2374da126902a4c6f94aa1c920a54f4eb8

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