Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7542c89f554912…

MALICIOUS

PDF

58.6 KB Created: 2020-08-13 13:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaee8a8bd11204ebff97cfcc9faeebb0 SHA-1: 7b0b4c72fcdaef1f5596ca4a8a0ea6c1f02ef9f5 SHA-256: 9c7542c89f5549123a441fc8393f45b49876844c3186ddbebdaf3b26fb606a90
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body itself contains the URL 'https://ttraff.com/wb?keyword=anticoagulants%20oraux%20directs%202018%20pdf', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=anticoagulants%20oraux%20directs%202018%20pdf
    • http://files.eastcommltd.com/uploads/1/3/2/6/132681213/7116649.pdf
    • http://files.melissahaneyart.com/uploads/1/3/1/4/131438211/5953721.pdf
    • http://files.dianapishnerwalker.com/uploads/1/3/1/6/131637853/80cf5b226f7b.pdf
    • http://files.womanstouchnj.com/uploads/1/3/1/4/131483005/6856060.pdf
    • http://kefuxoris.charlottesvilleveterinaryhospital.com/uploads/1/3/1/3/131383483/guvafex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/lusemidizififivo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/gubevatulukiranujetabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/blood_groups_and_red_cell_antigens.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/14556179541.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/84135559503.pdf
    • https://cdn.shopify.com/s/files/1/0450/1107/5222/files/technical_analysis_explained_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/35348813479.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/bilufopeposo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/definitions_of_development_by_scholars.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/besebunuxudozase.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/90584258566.pdf
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/50716105257.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/mega_man_x2_rom.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_off00009ee2.bin
b5bee8b876e4589a920fb64d0b21902a66287fed983ddc53dd6ce05a36a2772a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE2 5900 bytes
font_01_sfnt_off0000b301.bin
d91648c0c4c401355a1eb9908f953414843bf7b1da600a259a5d51806036b7fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB301 12888 bytes