Malicious PDF — malware analysis report

Static analysis result for SHA-256 62df4ea779bbb94f…

MALICIOUS

PDF

73.8 KB Created: 2020-08-13 23:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e585b5b5bc511433e7000e91cf6ef73 SHA-1: 595cf0160c75270e5b8cb716fa37b964b5fa1372 SHA-256: 62df4ea779bbb94fecc927f355089a0cc3e1fbb1782a234efc20cc476c6ad6d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final malicious destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to create a link farm for SEO poisoning, likely to lure victims to malicious content. The ML classifier also strongly indicates 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.com/pify?keyword=psoriasiform+dermatitis+wikipedia In PDF document text
    • http://siwejeb.mytwinoakshoa.com/uploads/1/3/2/3/132302780/176c4fb2e510.pdfIn PDF document text
    • http://files.all4pawsdogrescue.com.au/uploads/1/3/1/4/131455883/9425829.pdfIn PDF document text
    • http://files.variablerateintercooling.com/uploads/1/3/1/3/131380870/7671165.pdfIn PDF document text
    • http://files.livehealthywithcancer.com/uploads/1/3/1/8/131857723/8621480.pdfIn PDF document text
    • http://pigusa.wallinba.com/uploads/1/3/0/8/130814328/3836390.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/1/0438/3706/3328/files/sylvester_stallone_porno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/17177055942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/ahsanul_bayan_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/20817901431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2058/3065/files/27243398613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/editing_file_in_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/74543717356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3493/files/vapiwuxijopeligimepid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/wanuweteresuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/19372302649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/83676762753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3452/2279/files/kafulavumubugazibetodox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/wubusitagozurabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/92980266859.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 5312 bytes
SHA-256: f7d74ef1758bf1e80af6a9f4e5bee02eb75b0e01e1cf058cf3e441b486335fd4
font_01_sfnt_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 12644 bytes
SHA-256: 79dd2665f35d99f06a23d9967f194e2499a4224e89762762a78b951a578eb89d

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