Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c6f1f7f232c359…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 06:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ebcc75e5d4a05b180c758b87588aa8bf SHA-1: 3044c6f8080f08a2a7c0477da8d0ce4dcea1062a SHA-256: 41c6f1f7f232c359fe7976d2c6e1388165ac2972a9343cd99c42dc618304a62a
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt. The ML classifier 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.ru/pify?keyword=bromoform+limit+in+drinking+water In PDF document text
    • http://mozona.deebeebooks.com/uploads/1/3/1/0/131070382/jinujegejiralip.pdfIn PDF document text
    • http://files.shrubmadness.com/uploads/1/3/0/7/130775561/kefez.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/1/0434/1376/6296/files/mutosirukisil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/abdomen_agudo_gpc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/xesovamamoxakopotaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/converter_to_word_free_download_full_version_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/creative_writing_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/61747410584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/11149497500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9811/9071/files/ifrs_16_leases_illustrative_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/10485500894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/joxesokuxapuwufunuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6150/1349/files/tiseveditesanudula.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_off00006e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E13 5252 bytes
SHA-256: 75af1a4fcbbfdee1084da7ce76cd50eea0768a200e9b9b16a21cf023179c9dbf
font_01_sfnt_off00007feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 10352 bytes
SHA-256: a85e5b6e3a48ba7ce12f07290068b20fae895a5611d9bec8e3ae8bb77e813e17

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