Malicious PDF — malware analysis report

Static analysis result for SHA-256 6005fa8bf76ba1c2…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 14:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de89c1270e12a665004ed28eca1cb688 SHA-1: 1356979656ee048a79e5ca0aace0fec87ffde19c SHA-256: 6005fa8bf76ba1c23520e741f0802f1266d42b347c7e79beb6357ea4a2131ca5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a lure to trick users into visiting potentially harmful content.

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=fungsi+pendidikan+islam+pdf
    • http://files.volunteerteachkenya.net/uploads/1/3/0/7/130776521/2134470.pdf
    • http://files.engineering-philosophy.com/uploads/1/3/1/4/131453733/3879338.pdf
    • http://budup.buggybarnmuseum.com/uploads/1/3/1/4/131438800/cbe68611d17ce9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/zelupagukuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/gamoredejal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/courriel_web_videotron.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/nosaxisaxatafojimekujal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/proform_xp_160.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/barbara_cartland_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4314/files/metodologia_dela_investigacion_en_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/air_washer_system_design.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/poison_5e_condition.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_off00007e0a.bin
a2abd7077918d6a08c64bff2c2f2c24ca114b4d8aef11478a1f81304c3cc07ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0A 5284 bytes
font_01_sfnt_off00009003.bin
85a441bc6f56316999692f775234061aaff7b194a9d7e5251183642a6937aa29
pdf-font-stream PDF embedded font (sfnt) at offset 0x9003 10272 bytes