Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f588c0fc8b1da3…

MALICIOUS

PDF

48.0 KB Created: 2020-07-30 21:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 816badd65668922ec35dfeb7e95ac3eb SHA-1: 760f59ff1a846b39b625bd585a7397ecb983baa3 SHA-256: c9f588c0fc8b1da34208a7de532734da45ac074d0fc522effa62bf0db1d8c19a
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is part of the attack chain. The document body, though heavily obfuscated, contains text related to 'assessment center exercises pdf', likely a lure to entice users to click the embedded links.

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=assessment+center+exercises+pdf In PDF document text
    • http://files.thekentuckynational.com/uploads/1/3/0/7/130776126/4844393.pdfIn PDF document text
    • http://files.aubreyjardine.com/uploads/1/3/0/7/130740323/zerozizaxote.pdfIn PDF document text
    • http://files.step-by-step-declutter.com/uploads/1/3/1/3/131380471/5081074.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/1/0429/1015/4908/files/78476936693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/xolekenejasato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/24193299613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/valorosorasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/juteguzesolowetujobug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/jawudosolajimimujelalumik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/risunoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/zanagar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/98802204664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/tusuzofuwidugagunovufiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/75599946258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/87408865882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/24490809042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/59001585922.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 5

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_off00008076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8076 4792 bytes
SHA-256: b349d5f8aa7933758e6cd8608866d61653c8f053baaed9b86a99b17514167f2a
font_01_sfnt_off000090a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A2 10136 bytes
SHA-256: d22730f4900f635bba37b4d6d6db119f479ea8588a02f3cb1fcf5696dae3155e

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