Malicious PDF — malware analysis report

Static analysis result for SHA-256 07968c85b6fa2fb3…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 23:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5e6219693b74cb7f9943444b35cd904 SHA-1: adfce22fd70a5cb871f1ef3dc4f66864ab4be5b9 SHA-256: 07968c85b6fa2fb31c67e6b352e1b539115b1fb4dbc7bba69ea01cc6b69c9c2f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The presence of a download button lure further supports a malicious intent to trick users into clicking potentially harmful links.

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.
  • 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=berger+easy+clean+shade+card+pdf
    • http://files.ottawacornerstonebookstore.com/uploads/1/3/0/9/130969389/vusiju_sirupub_fogedoma.pdf
    • http://mofonit.disasterdiary.org/uploads/1/3/1/4/131407164/pobofimaxo.pdf
    • http://files.plymouthfamilynetwork.com/uploads/1/3/0/7/130739856/pakujik-vaxesagexalawi-tojuwevavirure-gusuduwuve.pdf
    • http://sudaru.nelfonline.org/uploads/1/3/0/8/130874601/talatinef-suvurofate-xepetojipiwaped-sufemawisiw.pdf
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1048/0537/files/fibazed.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/78579916165.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/vivimaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9704/files/5102320596.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/rafidazidutonar.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/free_printable_bunco_score_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/8856524165.pdf
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/coordonnes_polaires_vitesse.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/depugutize.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0609/files/sosifuwozaduxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1636/2904/files/molemasemovopadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/22592662194.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/53528135328.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e0d.bin
540ea4068c85a9b036ea5880359f2cfc63f03069d319bb0dacfa14cf2930f718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 5568 bytes
font_01_sfnt_off000070f5.bin
449666693af1d2d1d673b6dcd8b9a17b393d3182c2cfe044a631ce920673e094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 10328 bytes

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