Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af2b07629cd2e9a…

MALICIOUS

PDF

49.2 KB Created: 2020-08-16 16:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a98f4bec7012abd6bd5518300fb00a36 SHA-1: 2b3517ea62c8be211cda7d39e51754eb791c1f15 SHA-256: 1af2b07629cd2e9ad3905e2ed9eadf38182df260f28c7c317d3cc28edf7e2d54
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

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=mcgraw+hill+physics+answer+key
    • http://files.catholicchurchofantioch.eu/uploads/1/3/1/6/131606069/gumurimok_sujadudowaxeso_rixorira.pdf
    • http://vebiku.spacecoastchristianacademy.com/uploads/1/3/0/8/130813528/516691.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/drivers_manual_ct.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/40950504531.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/arabic_english_illustrated_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/allegiant_movie_english_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0437/2076/9685/files/57582563883.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/78701400230.pdf
    • https://cdn.shopify.com/s/files/1/0454/7464/4120/files/anemia_normocitica_normocromica_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/8198246677.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/62402112788.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/nakunojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64238793182.pdf
    • https://cdn.shopify.com/s/files/1/0432/4402/8059/files/toxoplasma_gondii_in_humans.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_off00007a8c.bin
7da83039f8bebbdfa185a9e5be7cac3c64d91dcf156c8293830ae3963e19795a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 5456 bytes
font_01_sfnt_off00008d36.bin
13c7ff4fb7e38a1a13240116b4111ca4fa8beca25575de20dddb298d8c6de6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D36 13396 bytes

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