Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab6e5c656e51948…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 04:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 494712bd12afa51a556eacb43eefb404 SHA-1: fdb471df0ac3599e1f286a1803d805cd293908ea SHA-256: 6ab6e5c656e519489617439bacdbea33cb5dd2cbd2e395bcc99bb89646199275
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector, indicating a malicious intent to lead the user to harmful content. The ML classifier 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.com/pify?keyword=apostila+de+capelania+prisional+pdf
    • http://files.sinandsatin.com/uploads/1/3/1/3/131383456/pokajuxelo.pdf
    • http://files.desantedesigns.com/uploads/1/3/2/7/132712661/tovon_febekutivit_riduwar.pdf
    • http://files.arosenthallcsw.com/uploads/1/3/0/7/130739330/ab4e94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/3937/0909/files/cancionero_para_guitarra_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7253/files/54062329762.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/gugixinamixiduxefami.pdf
    • https://cdn.shopify.com/s/files/1/0434/9467/0498/files/your_brain_at_work.pdf
    • https://cdn.shopify.com/s/files/1/0440/0598/2366/files/fidedafolopirokatinobimi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8701/7637/files/manifesto_pakatan_harapan_pru14.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/nejeposujavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/70185583656.pdf
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/1354972725.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/14825734605.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/stata_create_dummy_variables.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_off00007215.bin
6a06e14cc67071fa32119305ba6716737ce6b695cf2b02cb3c509685685c14d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 5140 bytes
font_01_sfnt_off00008393.bin
a9bede481ac1b451b00c7d629aeebff072e846da35db45d0934c0dabc891ef97
pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 10060 bytes