Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ba28d542508470…

MALICIOUS

PDF

35.7 KB Created: 2020-08-12 00:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4481f1069b8bd460dbc9f42cffb474 SHA-1: 1154e2cc355b948809b0bf91f3ab6d087bb2c71b SHA-256: 61ba28d542508470280e741fd075d82e755e89fe518013e2924e0c5bd101cd5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, masquerading as search results for a popular book, that point to a malicious redirector. This redirector likely serves as a gateway to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL reinforces this assessment.

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/pify?keyword=wings+of+fire+book+6+pdf+free
    • http://files.gravitysuccess.com/uploads/1/3/1/4/131437756/6258607.pdf
    • http://files.getbackpainfree.com/uploads/1/3/1/4/131452981/jekemejiw.pdf
    • http://files.nakaishatolbertbanks.com/uploads/1/3/1/8/131857315/zitigotowoxeluvife.pdf
    • http://files.lrba.ca/uploads/1/3/1/8/131860645/f18cf752ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1659/1272/files/analog_to_digital_converter_ic.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/25654224253.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/222383682.pdf
    • https://cdn.shopify.com/s/files/1/0428/6831/0172/files/73365155578.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/stihl_ms_170_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/habitos_alimentarios_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/kuwixokixetamewamavuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/supalinemonizudipam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/team_win_recovery_project_galaxy_s3.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_off0000493b.bin
07a710a2891c5ebcb6d2cd33a4e9359648735595d0f7cc856991afecbd2b2bfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x493B 5336 bytes
font_01_sfnt_off00005b7d.bin
36f500db8b5136deefee656bd545f25c06fee8b81ccb5d68da78f08a065f4f32
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 11368 bytes