Malicious PDF — malware analysis report

Static analysis result for SHA-256 a538e8b5301aa6a9…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 08:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7561a0440ecc934b876f75c65cbb6479 SHA-1: 0d042afacbd24294af46326a53c01554338aeb14 SHA-256: a538e8b5301aa6a9520236d456a06467eae30e2797e1f0f0c4cd636763410f7a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a malicious redirector link disguised as an offer for a free music app. The document body and embedded URLs suggest a lure to a malicious site. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=free+music++pro+app+ios In PDF document text
    • http://fifobodub.doulasofomaha.com/uploads/1/3/1/4/131437812/9735949.pdfIn PDF document text
    • http://files.thecharmerwpb.com/uploads/1/3/2/3/132302940/mozovafikimus_vabanibemoweso.pdfIn PDF document text
    • http://files.sunsetairporttransportation.com/uploads/1/3/1/4/131437312/9096797.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/1/0431/3900/6632/files/convert_xlsx_to_xls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/juzodabepanagelug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/android_scan_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/46510439001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/57903656735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/80009085415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5586/5243/files/buwutabimafejuxufuruwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2685/6601/files/calamities_renee_gladman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/92014990089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8284/1250/files/metabolismo_de_los_lipidos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/34119089124.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 6

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_off0000610c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610C 5004 bytes
SHA-256: 4f9fb87d8e271ac11696d158e59c60df81ff15dc60dddf16356da062c86d6ba7
font_01_sfnt_off000071f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 10304 bytes
SHA-256: 229caf6cd29647d7f9a308a0e7c132f5876319faaa220da196fc6476628cd8e6

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