Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d02936a927905d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 21:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f096b54dc0b443ca8f122a85b191d102 SHA-1: c31ef63aa3bc86c087a1db0cf01b66aedbc7eab3 SHA-256: 99d02936a927905dc5de7468ed7b78b35dd0e9425cd4a9cdd71d8c61f4da637b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.com/pify?keyword=agility+drills+for+basketball+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into clicking on it. The presence of numerous benign-looking Shopify links alongside the malicious one is a common tactic to obscure the malicious intent.

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=agility+drills+for+basketball+pdf
    • http://files.stbarnabaslinslade.uk/uploads/1/3/0/8/130874691/0c6501a.pdf
    • http://begozu.linwoodpto.org/uploads/1/3/0/9/130968984/vakodopuku-xanuvubaz.pdf
    • http://files.passerprojects.com/uploads/1/3/1/4/131453574/dugumuj-sibijaxironud-levodidurakam-wopusetudize.pdf
    • http://files.bencaunt.co.uk/uploads/1/3/0/9/130969548/gafikaxafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/fikezozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55742160690.pdf
    • https://cdn.shopify.com/s/files/1/0435/4477/2759/files/vedigezagigedo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0490/files/80420540647.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/71496569319.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/jowiregakijepuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/vakamun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/22696513035.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/chemical_equation_balance_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0437/5999/2990/files/vmware_workstation_serial.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fcb.bin
dcb3ccc7ee6ce6e46fa4ef0a5befeacae810bf4800a797b37e4c9a719b16a73b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCB 5188 bytes
font_01_sfnt_off00008188.bin
4f1521ce4b9ef361998c2b76fd35bd160aecf0aac1ef877ebcac751b1863e25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 9980 bytes
font_02_sfnt_off0000a3a1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A1 4324 bytes

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