Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b128567ed933a0e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-21 20:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2360e5b7acff13ff96240bcf438e02d8 SHA-1: 4c55c1e81b4a9955ad6677d32a83fdb9950bfec2 SHA-256: 6b128567ed933a0e4598eb244aec2278625f492de2a85046aa8bb5a1ec8bab15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious or SEO-spam related domains. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity as legitimate content. The presence of numerous links, including those to Shopify, indicates a link farm or SEO manipulation tactic to distribute malicious 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.com/pify?keyword=healthy+snacks+recipes+pdf
    • http://jomewu.pens4swordspublishing.com/uploads/1/3/1/6/131606349/zobisam_jezamadisogom_puxadadiposizev_lokurevawitar.pdf
    • http://sozerin.valhallamassagetherapy.com/uploads/1/3/1/8/131856281/gukukerobesoxogofa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/brass_knuckles_vape_pen_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2149/files/marvelous_designer_cloth_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/synonyms_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/how_to_exit_tablet_mode.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/examenes_cae_con_soluciones.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakawefefaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/40636545521.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5493/files/vibagawos.pdf
    • https://cdn.shopify.com/s/files/1/0463/9857/0651/files/fda_cfr_21_part_11.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/zasavide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/pupigodej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/how_to_override_bootstrap_css.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/kusutekoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/imf_report_saudi_arabia.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_off000067c8.bin
548911e891e521b8ab5b2d4ffd8bff5903912757dd5af5d976c0b8bf2ea32fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 5368 bytes
font_01_sfnt_off000079ff.bin
1859913c7b8060da78cdcde97bccdfa9d7118fde5e59bd9dd517e4661d54f49a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FF 10288 bytes

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