Malicious PDF — malware analysis report

Static analysis result for SHA-256 1558247448b7940a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 09:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f756d20329e8cafeb6c7a21121224695 SHA-1: 542a52b752b9e54e215d9aa729b71e61d7dedcbf SHA-256: 1558247448b7940ac447c33839a6686b1074594246aafa2eeff8b214b573cea3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches this malicious redirector. The presence of numerous other links, many pointing to Shopify, suggests a link farm intended to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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=character+analysis+of+lady+macbeth+pdf
    • http://files.elizabethkilcoyne.net/uploads/1/3/1/0/131070561/gudisuk.pdf
    • http://files.wcycnh.com/uploads/1/3/2/6/132683334/06da7f888693b2.pdf
    • http://files.morganfurze.com/uploads/1/3/0/9/130969418/4558770.pdf
    • http://files.frazerclanhitamerica.com/uploads/1/3/0/9/130969834/xosimarizuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/fallout_4_mod_list_2019.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/10th_class_maths_all_formulas_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/bachon_ki_kahani_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/gta_vice_city_san_andreas_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0430/1524/1891/files/plasma_rico_en_plaquetas_alopecia.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/fajojivuromowezux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9122/1923/files/85818168346.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/articles_in_german.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/os_x_snow_leopard_iso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/farajujisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5632/3995/files/dojobotelosegeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/35503463375.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/vedigatatumonozidatupale.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_off000067ab.bin
a2301347076fb3e21c2fdbe09bdb3a711e0aa52d55ae1aa70a6afb2112c3cc32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 5540 bytes
font_01_sfnt_off00007a55.bin
58f33aff977158493a258fb8c387ea71d40c520c49aa5f370037715a488073dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 9988 bytes

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