Malicious PDF — malware analysis report

Static analysis result for SHA-256 785724586b9af113…

MALICIOUS

PDF

33.3 KB Created: 2020-08-15 23:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8343879b49023d6ef5e36bf2ac61a9f SHA-1: ff3a2e90b312c5414a604fc7c7bd557310f00d78 SHA-256: 785724586b9af113870c1016ba1b08d2c5bb8473141102b54eea5cf3366c6037
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, contains text related to PDF compression and includes the malicious URL, suggesting a phishing lure. 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.com/wb?keyword=compress%20pdf%208mb%20to%202mb In PDF document text
    • http://kibamuba.amoclarity.com/uploads/1/3/0/7/130739227/susijetone_safutiz_wimevu.pdfIn PDF document text
    • http://files.myroncotton.com/uploads/1/3/0/9/130969364/9373256.pdfIn PDF document text
    • http://lofuwus.longswamphistory.org/uploads/1/3/0/8/130874038/815af11f.pdfIn PDF document text
    • http://jepetokif.tshra-austin.org/uploads/1/3/0/7/130740609/9c7b4c5a.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/1/0440/5107/1126/files/insert_animated_gif_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7339/6133/files/tatabusak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/52985956666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/pipozatebufozunosozapirax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/y_ahora_te_vas_acordes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/43816497603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/xesavafeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9465/0535/files/zagedulalibunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/pennsylvania_drivers_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/42135978997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/learn_latin_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0937/1286/files/otite_sreuse_traitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/1350720450.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 3

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_off00004561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4561 5316 bytes
SHA-256: 807e3df30c642b1b2bd104c728a43d556d92fdddedaa909ee693741911ebee51
font_01_sfnt_off0000575d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x575D 9684 bytes
SHA-256: c5f9141aa5395881236fd027993dd8542df7620b36870cd7c4f249901fabac27

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