Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b73090a2c02fe4…

MALICIOUS

PDF

36.8 KB Created: 2020-08-21 19:38:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6444536278d7d6225ab27969eb7651c SHA-1: 8813e51ee501cf12b83758b7ec55da9d177c46e3 SHA-256: c2b73090a2c02fe4b2eeee1aaa5d4f0015a4221bdb14ffad8bc8de7c9afdc440
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Beginners guide to photography pdf' and includes the malicious URL. This suggests a social engineering lure to redirect users to malicious content.

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.ru/pify?keyword=beginners+guide+to+photography+pdf
    • http://wejezurur.boatstories.co.uk/uploads/1/3/1/4/131407148/pukewixetav.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/24900204905.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/can_t_let_go_novel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/45377664060.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/cdma_2020_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/95126601675.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/tisopejejezebitule.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/12648858461.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/zekapatusadijubiwiwe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/48846563797.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/82107941772.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/epidemiology_and_biostatistics_for_the_usmle.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1446/files/clair_de_lune_piano_sheet_music_original.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/45047789982.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005301.bin
c3861d56f1f1ee3bd36b7b8340a5711fbabb077a53c0d3e519f7ada04900ff6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5301 5420 bytes
font_01_sfnt_off00006577.bin
2c2e47714800f6182989fae3b7f5a50513da5d94fa198a84a5eb749e5942b7c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 9636 bytes