Malicious PDF — malware analysis report

Static analysis result for SHA-256 afcb24c856db1002…

MALICIOUS

PDF

32.9 KB Created: 2020-08-02 22:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3144ad36ac3b607b752db018beb732db SHA-1: 6fefb8f49db38e33061a172c5a10306415044b0e SHA-256: afcb24c856db10027015bdcb0a2e96cb0365e34fcaf16d3f83056c88548c200a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL and the link farm strategy are strong indicators of a phishing or redirection attack.

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=incubus+stellar+lyrics In PDF document text
    • http://kalifeb.drpattymain.com/uploads/1/3/0/8/130874012/1b671d19.pdfIn PDF document text
    • http://files.eventsbytoc.com/uploads/1/3/0/9/130969918/2446d07.pdfIn PDF document text
    • http://files.museumofsocialjustice.org/uploads/1/3/1/3/131380337/minuwuvexi_boxivos_sokovon_rapasajaxefif.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/1/0432/9386/8187/files/getivigixuwezamabesefesep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/67891612381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/zirij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/kokemifakebovokekono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/59273585525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/16049031626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/vagutuparowojotumageze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/3812408274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/wesamigebadi.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_off0000444d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x444D 4972 bytes
SHA-256: 170be91f313c437446ed5a76bb01371f323f4a62097fd6e76619046ad001b2e1
font_01_sfnt_off0000554a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554A 9972 bytes
SHA-256: 1fb694b263f3c5046a5a6168a79df670463e5c6182b0d820b00e490f801e525b

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