Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4af500778ae22f8…

MALICIOUS

PDF

47.6 KB Created: 2020-09-09 22:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01c7e4cd6e23bb4f01ae9f9f367bbb17 SHA-1: 29217e6b64cc0b3486769741e7d3868a1541c85d SHA-256: b4af500778ae22f8138ccb6c0a31567effbfe3a0ab208a8fcaab5407a1da9a8e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wb?keyword=vba%20worksheetfunction%20index'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, while some are benign, suggests a link farm or SEO poisoning tactic to distribute the malicious document. No scripts were extracted, but the redirector URL is the primary indicator of malicious intent.

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.com/wb?keyword=vba%20worksheetfunction%20index In PDF document text
    • http://files.saviainhomecounseling.org/uploads/1/3/0/8/130814126/3aff17a67f4.pdfIn PDF document text
    • http://lilorat.yoursunshineyoga.com/uploads/1/3/0/8/130874493/teserixu.pdfIn PDF document text
    • http://files.bolddiscipleship.com/uploads/1/3/1/3/131398541/korokizanuvuvir.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/1/0463/4139/0492/files/attorney_lien_form_sample_florida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/heroes_and_generals_light_tank_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/butuxubofawutiratekupav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/36187098663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5869/1237/files/36819141320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4076/3030/files/80s_anime_boy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/19541490867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/safety_training_certificates_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/sizabisozotusebesamipera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/33913366765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/1190288240.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7058 3388 bytes
SHA-256: 70d79c5b247b0d7c191cf219ad25a62f913c8a080650c49fbabdca65f1cd2746
font_01_sfnt_off00007c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C88 5404 bytes
SHA-256: 427bfe1d0fe0a3e95d8044eb76e0209c9f770388619f6d1546d752ec8bb8089d
font_02_sfnt_off00008f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F00 10004 bytes
SHA-256: a8f208a73a13feb30e650b9f90624b4e23dada592501b16537970ab13f85c537

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