Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0ae1a542bb09bb…

MALICIOUS

PDF

34.1 KB Created: 2020-08-18 20:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc233cea1c87deb4fe17d4892af2151 SHA-1: 61adc711cdb8aebec0d11a43b56a441cdc67b8c4 SHA-256: 5f0ae1a542bb09bb8f45f30aab263671a9c2363e1fc700118de9dcf35015a690
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with a critical heuristic indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding. The presence of a large number of external links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=wicked+game+london+grammar+sheet+music
    • http://files.family-heritage.org/uploads/1/3/0/7/130776131/2654907.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/pewifoxovudavefaletoreguz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/como_hacer_crema_de_calendula.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/pewidagukus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/94241658911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24803542318.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/28246246597.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/kitijajufolav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/rekuwaduvujivozowelowuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/84063356374.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/zilusiweduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/access_bars_knjiga.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_off00004700.bin
983ea562228fc9981a3d6e12feeed17b50f82f0202dff4dc318a859c3b45932d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4700 5432 bytes
font_01_sfnt_off00005952.bin
29e85adbaf5fffb573c5cfc5239426b3470df0194624973407b6fa1b986fe10e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5952 10088 bytes