Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf52265166bf01d…

MALICIOUS

PDF

39.9 KB Created: 2020-08-04 20:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57ff1533ec7b2153c31102899a86b4cb SHA-1: 1e7774aad45ed7b2a39dd567b1ae381a7bf7d7be SHA-256: 4cf52265166bf01d3e74232f1742bd09a1306d68c2809abf14c386009fbef143
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 a link farm hosted on Shopify. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains text related to a 'bulletin' and the malicious URL, suggesting a lure to trick the user into clicking the malicious link. 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=psc+bulletin+diamond+jubilee+edition+2020+pdf In PDF document text
    • http://files.prohuntersights.com/uploads/1/3/0/8/130813663/2623225.pdfIn PDF document text
    • http://files.wakingdream.ch/uploads/1/3/1/1/131163684/3846310.pdfIn PDF document text
    • http://files.the-war-machine.com/uploads/1/3/2/6/132695639/f75f87e79.pdfIn PDF document text
    • http://dimudi.hcmbbtourney.com/uploads/1/3/1/4/131407227/sowaduludadima-kidijaj.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/1/0429/6628/6490/files/jajakalewimexor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/4986795657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/514908197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/gregg_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/dipegasadetuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/zubixamativavibimiwez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/famigibagazonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/60290798348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/38434486693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/castrol_edge_professional_longlife_iii_5w_30.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/mefadiwofalikejufewuto.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 4

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_off00005b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B81 5696 bytes
SHA-256: 920ab84243ec21dceaf8757bae6e5bd5534b8f3683285b91d765ba136e34c1f7
font_01_sfnt_off00006ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECE 10444 bytes
SHA-256: 1142bbcb334b17d4d4742338f6bef17484b94bd1d3fbf8d5b3c8522dec74b1b7

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