Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6beb6f662ab2e6…

MALICIOUS

PDF

76.3 KB Created: 2020-09-02 00:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347185c546b0529132724272ad4436db SHA-1: 80dfb8454306124f61806d49c3cb2282007d5794 SHA-256: bc6beb6f662ab2e6ac7a7c4700878d66fa304b2439ea20b98bc48eebbaa62cdb
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=manualidades+con+papel+china+para+navidad`. This URL is likely used to redirect the user to a malicious site. The PDF also contains a large number of embedded links, many pointing to benign Shopify URLs, suggesting a link farm or SEO poisoning tactic to mask the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=manualidades+con+papel+china+para+navidad
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/bma_guidance_on_fees_for_medical_reports.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/acidity_of_phenols.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/vaxadivadolifeporak.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/95282406324.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63a33f508754923bdda1c87aa9d44a9.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_e7bf9bcedfb8471f8fc1a1344ac89bbe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/uranium_enrichment_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/focus_t25_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/anandamayi_ma_biography.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/list_of_acids_bases_and_salts.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/98917229222.pdf
    • https://cdn.shopify.com/s/files/1/0430/4846/8631/files/remote_interior_angles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3715/files/bangladesh_election_commission_job_circular_2020.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_off0000ecc0.bin
242ea84bc30673234929f32c976150ea489196845f19743a03aae09819b86fca
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 5224 bytes
font_01_sfnt_off0000fe8e.bin
7d8f3ee3ce3dfe172742aeeb4101aaff22da408df0cbb06fffbf5eea9f65d927
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 11000 bytes