Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f474eab55c3ca1…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 01:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f3bd148bb823f3f0a918c122b4576d1 SHA-1: f37e336148bd92f85d24b7ec8789e29ef7af7544 SHA-256: a8f474eab55c3ca16b1d70883b98599ac9e98438c066c4c27b16a1995fe793a4
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=arteriosclerosis+sintomas+pdf, which is flagged as a malicious redirector.

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=arteriosclerosis+sintomas+pdf In PDF document text
    • http://files.sinkorswimapparel.com/uploads/1/3/1/1/131164460/5493933.pdfIn PDF document text
    • http://files.cuaahumboldt.org/uploads/1/3/0/7/130738712/megizefepax.pdfIn PDF document text
    • http://files.transcendingwalls.com/uploads/1/3/2/6/132682471/241530b.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/1/0430/4912/3993/files/ridefenagexogivakavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/learn_advanced_microsoft_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13121593915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/denefawowopekidib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/97045795206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/lozofozekunezex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/92638160944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4995/8046/files/15102064796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/sisakijalabedobalox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3703/0560/files/basel_iii_sbp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/60322773923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/57592476658.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_off00006858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6858 5288 bytes
SHA-256: 1a364eb3b30ea424c57cb9931e8a208b2f12fcb7cdecb6d80a13c9348934b24d
font_01_sfnt_off00007a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 9928 bytes
SHA-256: fe0afa7268d7c8c471a4df448365b2348faddae2b13391f0a17b532e18adfbc9

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