Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ef69fde3a009d7…

MALICIOUS

PDF

55.9 KB Created: 2020-08-07 17:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2624df410c7437a632dad963dff5cd22 SHA-1: 9799f151f4c1ea8d232415e50af9afe41e0c1a25 SHA-256: 62ef69fde3a009d7b24b94108cd6fde57684162abdb3c9c316698409d9f4375a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded links are the primary attack vector.

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=cope%20rearrangement%20reaction%20pdf
    • http://files.mdmedicalspaandwellnesscenter.com/uploads/1/3/1/8/131857758/lamezol.pdf
    • http://nilikaja.agelessfitsb.com/uploads/1/3/0/8/130874330/bazop.pdf
    • http://files.projectinfolit.org/uploads/1/3/1/0/131070051/webikefubevu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9794/7288/files/jiwemelaborubenogogider.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/74008986912.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/45660188135.pdf
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/how_to_turn_off_avast_popups.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/rolek.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/primer_of_public_relations_research_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/kajozemaratisapin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/94903986009.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8336/files/real_easy_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/69066111615.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/29358570975.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/how_to_convert._mov_to_mp4.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_off00009e0d.bin
ed55f0a6d24a7dc46775a41520ed419b5006b7e248d9ef53b96389e85a9a86e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0D 5168 bytes
font_01_sfnt_off0000af8e.bin
451f3ba57291e1c7e20aca0e3ef8c4e552ae454a5407f20a8832adc74837185e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8E 10304 bytes