Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c79194a0b87dbb…

MALICIOUS

PDF

40.9 KB Created: 2020-08-16 20:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6af4c317987d61018d4c91e6201f3e0e SHA-1: 53f44cb2f12633ea569c82c4e759479b5a7844fe SHA-256: a4c79194a0b87dbb081c4410bbbb1c7c6f192f001d17993ee74107811462c384
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector suggest an attempt to lure users to harmful content or to artificially inflate search engine rankings for malicious purposes.

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=water+pollution+ppt+presentation+free In PDF document text
    • http://bisazatas.fearnotministries.com/uploads/1/3/0/8/130814297/2836933.pdfIn PDF document text
    • http://kolokulen.judithrpetersonphotography.com/uploads/1/3/0/7/130776485/5917258.pdfIn PDF document text
    • http://files.wonkymonkey.nl/uploads/1/3/0/8/130873983/5586675.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/1/0439/9765/9294/files/cabinet_making_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/melamewexobalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6521/3079/files/26808115891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/60074597816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/povomuxaduwozexofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/blame_master_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/clinger_cohen_act_implementation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/komimawukapejesawobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/xesulej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/59984238462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/annotate_ipad_adobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/62037777179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/domino_s_pizza_bahrain_menu.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_off0000637d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637D 4908 bytes
SHA-256: 3755be46857d22cb85537e27c495ce851c776517823b58004b7ec0be62cd35c3
font_01_sfnt_off00007449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 10216 bytes
SHA-256: 67aac5587c7334da948931949362a8b91cb154c68140a1cde6a85cc5440a09bc

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