Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac3c171dc70cd12…

MALICIOUS

PDF

47.9 KB Created: 2020-08-24 17:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4232b9386f0e1e6ccb6a55e1b5596da1 SHA-1: 56e1942b23a4e29bbba1d98c237a306f72a45209 SHA-256: 6ac3c171dc70cd120dc2e0a9c9f058c3e02393ae4aa87a28a9a96f556de88405
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a PDF redirector link pointing to traff.cc. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF URL, suggesting a lure for free downloads. The ML classifier strongly supports the malicious verdict.

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=k9+web+protection+browser+for+android In PDF document text
    • http://files.brambleithaca.com/uploads/1/3/1/3/131380786/saxisapilojasam.pdfIn PDF document text
    • http://files.valuefund.ca/uploads/1/3/1/8/131871535/8237561.pdfIn PDF document text
    • http://dudud.hhslmc.com/uploads/1/3/0/7/130738970/pitisiwelenisejosuzu.pdfIn PDF document text
    • http://neboza.hammerheadfleet.com/uploads/1/3/1/1/131164250/c33787bc94ef.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/1/0440/6041/0006/files/60156733369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/generative_adversarial_networks_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9402/0000/files/google_spreadsheet_count_if_not_empty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/asco_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/holt_modern_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/posadafip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/xugopekatafixolanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/voxuxedazavamopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/how_to_uninstall_virtualbox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 5264 bytes
SHA-256: 3579fcd4d7f03e6587465237bd7ab6ce9b0a59c39dbd7084ba13fb33d2a74856
font_01_sfnt_off0000806b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 10668 bytes
SHA-256: ea20f69be180c2dbef6ef453934ef4e0fc8988996bcb13672309b41de112072a
font_02_sfnt_off0000a4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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