Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb31167a13cc24e8…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 03:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca34205ff6550045937d927ec1a41724 SHA-1: 6ada244163664cd4a1432fa67a9f507267ef3845 SHA-256: cb31167a13cc24e852ec3d5fa58297b873f846f3dee92f4c194330bb4973a7bd
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though partially corrupted, indicates a lure related to 'social media marketing strategy pdf'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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=social+media+marketing+strategy+pdf In PDF document text
    • http://files.westernheightsprimary.com/uploads/1/3/1/3/131384121/papatuxezugam-fifar.pdfIn PDF document text
    • http://files.ngcorporatesolutions.com/uploads/1/3/2/8/132814342/a246127.pdfIn PDF document text
    • http://files.godsgracehawaii.com/uploads/1/3/1/0/131071137/7237786.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/1/0437/3423/7345/files/43025366321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/sipemikabir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3320/5655/files/66477926778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/48976282144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0234/7171/files/vomuvijenejineri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/jozataxezosezezumoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/38160764539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/71156945762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/wepojevaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/australian_cardiovascular_risk_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/19547973400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/75646625349.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_off0000718c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718C 5744 bytes
SHA-256: 9496d4807b6131740b7dc76106099ba5ef47b5e328cb7cae551836dff6629969
font_01_sfnt_off00008517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8517 10788 bytes
SHA-256: 4800a0331d6b00057149082323063c7910e6b0d36353eca6262377a0fe942cd4

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