Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baf7e7e59f899a6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 19:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32150c5c694da5bae2fa8b8472297223 SHA-1: 60ad8b92aa02b1395fbd161353ca9515c6299cd9 SHA-256: 2baf7e7e59f899a6a36638443f879938eaae6b8bbc3a0a2b7ab8015994adc0c5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains links to a known malicious redirector. It also exhibits characteristics of an SEO link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=formation+afnor+auditeur+externe', which is associated with malicious redirector infrastructure.

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=formation+afnor+auditeur+externe
    • http://files.baileysandouille.com/uploads/1/3/2/6/132695416/konalunesas.pdf
    • http://rapukoj.waidnerresearchlab.com/uploads/1/3/0/8/130874431/lafanutidivisufe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/73317460702.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/selezixebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56317886700.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1904/files/99776955642.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/38425718927.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/dejadelejonadogu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/geode_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0438/6347/4331/files/brighthouse_financial_life_insurance_surrender_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/didafezetaxakelabukewiju.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/78983758415.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9203/files/2313213030.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/42738909312.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_off00006269.bin
2894572590af8157c1801a2bab476ac51003f3d42b6d2e2103d1b6b93f3bda1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 4868 bytes
font_01_sfnt_off000072dc.bin
691ade46baee7c4de82baa81afc40b0f30a9a50377577745f787a5a8fca3e30d
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 10492 bytes