Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b485b0f24c7f63…

MALICIOUS

PDF

40.8 KB Created: 2020-08-24 18:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b9ef9adf4e4660bb0cfc3b3721c427 SHA-1: 795c6c8aa7c7842f5599a400ed569f837e13b215 SHA-256: a5b485b0f24c7f63154c32274b918f8437547e0d13197d5621e2d070a89422bf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious link disguised as a prompt for application information, which redirects to a known malicious domain (ttraff.com). The document also features a large number of external PDF links, many hosted on Shopify, likely for SEO manipulation or to obscure the malicious intent. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=any+further+information+to+support+your+application
    • http://files.ruthiemountainsmokedpepper.com/uploads/1/3/2/7/132740949/a0e85e56805acb8.pdf
    • http://files.wmclb.org/uploads/1/3/0/7/130738657/sekuleguritu.pdf
    • http://files.etceterabooks.com/uploads/1/3/0/7/130776795/seluruneziz-vazekuziwovu-nebawidasiwuxax-sufotaxun.pdf
    • https://cdn.shopify.com/s/files/1/0460/0276/5985/files/go_math_7th_grade_advanced_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/bade_acche_lagte_hai_male_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0454/7182/6072/files/2017_appropriation_bill.pdf
    • https://cdn.shopify.com/s/files/1/0432/9488/4000/files/tetutidologetilaker.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/analytical_mechanics_i._n._hand_and_j._d._finch.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/resize_image_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/fafixuxoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/75312784968.pdf
    • https://cdn.shopify.com/s/files/1/0428/9393/4748/files/26800106258.pdf
    • https://cdn.shopify.com/s/files/1/0433/8673/2707/files/car_game_apk_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5606/1850/files/83368618411.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006190.bin
33d537e6990b99222ecbfcbc4682d068271315e966da3eb9bd82adcbd61a2c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 5348 bytes
font_01_sfnt_off00007396.bin
6e139e6faaddcca8fafd7770edd8cb32da2cdd165538698e41bcfe11fbe3963e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 10112 bytes

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