Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb141cb9d147eb56…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 18:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a80ba90d7bab560c8dd16f2ec3d30aa3 SHA-1: ce59c1fcd7cddb73da6619aa20b661b77db99da7 SHA-256: bb141cb9d147eb56a46d632bb571970b38eccf82f68097fd8ab49b6de08988a0
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and a password-protected archive lure, suggesting a multi-stage attack. The presence of a download button lure further supports the social engineering aspect of this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=bloody+roar+3+pcsx2 In PDF document text
    • http://files.utahmicroloanfund.org/uploads/1/3/0/7/130775310/gurexadudedi.pdfIn PDF document text
    • http://files.meganhelm.com/uploads/1/3/0/8/130874493/8ea587e777eb.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/1/0431/6112/5013/files/34231395008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/logonixawaregejuvaxeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/werubulajiseronarotinopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/livakedorupokemetewenax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/nazca_lines_mystery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/psychological_theories_of_deviance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/sewonisazata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6182/files/79808166509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/mcmurry_8th_edition_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/75991747104.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 3692 bytes
SHA-256: deb2d3a9a3a298d0d1dd0b5fd513b6a6885973d92e3866e8ee6a09e33777ec5c
font_01_sfnt_off000068bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 5580 bytes
SHA-256: 83960079d5a6f7d4e9c64964dc940a3835378b833fe1c7b99cc5370bf560359c
font_02_sfnt_off00007bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCC 10684 bytes
SHA-256: ebdc00fef2b0da1774d623e73a4a8fc159a8a7643cddbef564200186b9c1f56e