Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f8fa4995ffc24f…

MALICIOUS

PDF

69.0 KB Created: 2020-08-20 21:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c2dd7d327d86b4d7b59241087176f5e SHA-1: 4e913fa2082f754d55b6dca8f76ad32b01f4615b SHA-256: 78f8fa4995ffc24f850698e4f2820f952e4c201e7408114d857e72a2f12fe55d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to a redirector service, which is a strong indicator of a phishing or scam campaign. The ML classifier also flagged this PDF with high confidence. The presence of a 'download button' lure and the link farm suggest an attempt to drive traffic to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.cc/pify?keyword=adb+wifi+android+studio+mac In PDF document text
    • http://japaworiz.stmonicaschools.com/uploads/1/3/1/4/131437402/5479673.pdfIn PDF document text
    • http://tesuwo.randybaskerville.com/uploads/1/3/2/7/132740873/gifodituju.pdfIn PDF document text
    • http://files.naspain.com/uploads/1/3/1/4/131483108/fazaxusiko.pdfIn PDF document text
    • http://narezojog.wisdomcabbageinc.com/uploads/1/3/1/8/131856772/3fb075.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/1/0432/4678/0579/files/unisa_application_appeal_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/54457161696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/71598371883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/dobuwemaxigolatebipud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/zamosizusarozajasejaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/fobifan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6422/files/70038178906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/solution_book_of_thomas_calculus_12th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/bajufeworub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/46896446886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/power_of_attorney_form_colorado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5932/0734/files/13099076240.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24F 5356 bytes
SHA-256: bc2ae278905e5e9a48e7aa6f505829e2d2536e248eded1855c4ed508ee7f0b59
font_01_sfnt_off0000c47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47B 13936 bytes
SHA-256: 5706da485e3220eed99555c25c597742204d32bf235337c81b71e324d56e776a
font_02_sfnt_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190