Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6fa68b3d514987…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 08:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b485f333a8424e8224dad17e0496097f SHA-1: fdf8a6775141333dd5bac32c47ef2321c2ec00cd SHA-256: 4a6fa68b3d51498793b54c2b1df82828ecdf3dd1167a8cfa14ed5cc1c65053a6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=hindu+baby+boy+names+in+telugu+pdf In PDF document text
    • http://files.modernartphotograph.com/uploads/1/3/1/6/131636775/lofutaga_luxerefozir_ramasajukitekab.pdfIn PDF document text
    • http://files.fullflightcounseling.com/uploads/1/3/1/3/131384567/f80cf60e94dbec.pdfIn PDF document text
    • http://files.jennanormanphotography.com/uploads/1/3/0/7/130775867/9943146.pdfIn PDF document text
    • http://files.mattawanmasons.org/uploads/1/3/1/4/131408432/tetegifakebe.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/1/0429/5848/7703/files/nofewitowimeziserutoraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/58233178615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/14820446445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/69779187519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17612659915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/86854099037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/13651348063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9444/2137/files/39116870790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/celsius_to_fahrenheit_conversion_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/rasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/zosiduzilodosof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/15058536361.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB2 5468 bytes
SHA-256: d09e9dae8bc96c0dac28a67d2a2ca06625f30ab279bf583d4288c460ad05fa04
font_01_sfnt_off00006f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 3596 bytes
SHA-256: 453c7bd406ce20af536b3f2c1292d8d8496f9f49c6166116be2d7843b33753b0
font_02_sfnt_off00007d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 10076 bytes
SHA-256: e15e946f981952b4df3f854afaf862487810a15d280667cfe6abef1ffc4a9b28

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