Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cb1fc7525eaad8…

MALICIOUS

PDF

87.2 KB Created: 2020-07-29 18:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d96a3c99319b2afbf8eaceee45580913 SHA-1: 16f418bb5712159cb2e275e019781914d4bde592 SHA-256: a6cb1fc7525eaad80caf033d70ce3b7dd9def58061dff3274a4d5475e45d6d92
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

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=international+journal+of+mathematics+in+operational+research+pdf In PDF document text
    • http://files.northeastglobalmissions.com/uploads/1/3/1/0/131071067/66c089.pdfIn PDF document text
    • http://files.vk3sn.net/uploads/1/3/1/8/131871894/d40f274a4b81b4.pdfIn PDF document text
    • http://files.ddavemods.com/uploads/1/3/1/3/131378990/f4a1b193.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/1/0437/7496/7965/files/lujifevumuruzemituvesafak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5226/1795/files/nepazizesorinipives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/saniwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/96988482183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/67616073325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/moxagagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/zowopuzizasagowakaruluxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/56919342798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/gawelelefubuweninabofika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/toraladomokipina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/bigewukonopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/kolokukibuwedadinak.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 8

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_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 5292 bytes
SHA-256: 21b380468e5674f647c2f707aecb0cf04df7efc7e92e0bf95e6aee74806dc5fd
font_01_sfnt_off00012a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2A 10832 bytes
SHA-256: 4abfbb0611afed5c349500c286c2882d46bb093444b125d66f9fd133257d6c99

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