Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a91f5e77eec2421…

MALICIOUS

PDF

55.5 KB Created: 2020-08-12 09:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94707486bd582b5b0e6f676bf131c957 SHA-1: dc523c616e81d7aa7dabed2d7065f47953a2ed1e SHA-256: 0a91f5e77eec24218c63940604ea0f50af21ec3fc6e1c902653bf1dffb15207d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to PDF downloads and the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of a redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

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=mother%20sauces%20and%20derivatives%20pdf%20download
    • http://jebotewad.jacquelynspeare.com/uploads/1/3/0/8/130874601/785866675bb309b.pdf
    • http://pinox.dscampers.co.uk/uploads/1/3/2/7/132712315/wokisu.pdf
    • http://files.collinsvillecrimsoncadets.com/uploads/1/3/0/8/130814043/womozazidiwulip.pdf
    • http://files.windersonscreations.com/uploads/1/3/1/4/131406082/5184639.pdf
    • http://files.lappiesinoz.com/uploads/1/3/0/7/130776745/movedevigak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/gta_4_1._0._7._0.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/36738571076.pdf
    • https://cdn.shopify.com/s/files/1/0436/7784/3609/files/breast_cancer_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/41180104188.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/nifobesiminazaxafuluwipel.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/bozanstvena_komedija_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/28509609994.pdf
    • https://cdn.shopify.com/s/files/1/0447/5407/5799/files/system_analysis_and_design_notes_for_bca_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/85606546947.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0430/4073/5381/files/leboxorewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/eolian_harp.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/gastroenteritis_dieta.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_off00009a59.bin
a1265071746b47b53ff90ea3fc8a7fb055e28d8627457d675cf202b19a2be7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A59 5400 bytes
font_01_sfnt_off0000acd1.bin
468689323f657c2663518935b6de8bfb274f1cc2631bd3e79f796248ce6556e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD1 10364 bytes

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