Malicious PDF — malware analysis report

Static analysis result for SHA-256 4406831934d32b48…

MALICIOUS

PDF

110.7 KB Created: 2020-08-22 00:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: feeb74e7285223e3b4a9b8e8fa83cc90 SHA-1: 978dd3e331b09199be4695f827f9edb13bc586d2 SHA-256: 4406831934d32b48b7acf405d8c695485edb403198d07595f653570445db794a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though heavily obfuscated, contains text referencing 'Attack on titan reiner and bertholdt transformation' and the malicious URL itself, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, some of which point to benign content while others are unknown.

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.ru/pify?keyword=attack+on+titan+reiner+and+bertholdt+transformation In PDF document text
    • http://files.msdgrabs.com/uploads/1/3/2/6/132682076/nalaxujuf.pdfIn PDF document text
    • http://files.digitalindy.biz/uploads/1/3/0/8/130814226/sejovuwewemolune.pdfIn PDF document text
    • http://tegeg.rosevillacookieco.com/uploads/1/3/2/6/132695569/jelavukuzago.pdfIn PDF document text
    • http://dapefa.utahstudentnurse.org/uploads/1/3/1/4/131438304/vezoziwofu-nobizobenofusu.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/1/0446/9247/1962/files/apostila_de_adestramento_de_ces_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/4824/6952/files/49940086909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0988/files/divisible_by_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/60998914983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/arthashastra_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/48747166116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/refer_annexure_e1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/56716670922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/sejadejoderib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/79245974051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5233/5255/files/jelifoxopedafakewuvutix.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 8

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_off000161eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161EB 6164 bytes
SHA-256: 4678e9157dc68f51815442569a09385845576511fdbb10572915fcf1d1fb95aa
font_01_sfnt_off000176f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176F8 5452 bytes
SHA-256: a7078e27d2389fc3ecdf7e763111110fa1f19b4dece5d8bd49f9e37f4a70fb80
font_02_sfnt_off0001894e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1894E 10288 bytes
SHA-256: e2ff74363a6f572af40427f3cb2dcc63a41ddadd97dca6bef7f11987a12c2a48

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