Malicious PDF — malware analysis report

Static analysis result for SHA-256 636417f53ff05169…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 19:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6bb6fbd859396f9196a2ca9b7d5e21f9 SHA-1: 02b00b5387175ae62b7056902982e7743152023a SHA-256: 636417f53ff051698611f9fd6db0c76c8bedc515c7c6ab6b5dc1e51942a8ab83
194 Risk Score

Malware Insights

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

This PDF document contains multiple links to a redirector service, which in turn points to a large number of other PDF files hosted on Shopify. The primary redirector URL is designed to lure users with keywords like 'samsung adb drivers free'. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the use of redirector infrastructure and a link farm, suggesting a phishing or malware distribution campaign.

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=samsung+adb+drivers+free In PDF document text
    • http://files.pencilartistbobbygoldsmith.com/uploads/1/3/1/4/131453276/bomoj.pdfIn PDF document text
    • http://dogenan.dewintondesigns.com/uploads/1/3/0/8/130814328/bccaf.pdfIn PDF document text
    • http://files.justagirlbjj.com/uploads/1/3/0/9/130969663/fefunaziwuz-zidoripuro.pdfIn PDF document text
    • http://files.thebinarylivingway.com/uploads/1/3/0/7/130775653/fifedexezubo.pdfIn PDF document text
    • http://vexora.beinmaroc.net/uploads/1/3/1/6/131637016/lezadovug-xanepazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/nezusepava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/muxolakesuzemera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/77971132340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6076/4576/files/42974727104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/27389906325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/61999762168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/chandrayaan_2_information_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/attestation_de_salaires_dclars_cnss_tunisie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/99543340065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/functional_strategy_and_strategic_choice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/7291043159.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000644b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 5192 bytes
SHA-256: dfa66b076091d173821da465f24ee15fcd2d9f9b6a1e5bfe28c3de8f31969d31
font_01_sfnt_off000075c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 9792 bytes
SHA-256: 32473cce58ea1001e76e440aa860f94f282d744337cf92523d2e0e7fc042bc92
font_02_sfnt_off0000975c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x975C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230