Malicious PDF — malware analysis report

Static analysis result for SHA-256 206649f1f88c3ede…

MALICIOUS

PDF

48.0 KB Created: 2020-07-30 22:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2afcb0bb7e0370d17ce0c2d8f21fdb65 SHA-1: fd2c53f248177dd30b2989be5122801531dbd84c SHA-256: 206649f1f88c3ededec7e241b85ad87dcb6ed1e3cda57a1e2d7395325465ccee
154 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 pointing to Shopify domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=alpha+male+strategies+pdf+download', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'alpha male strategies pdf download' and the authoring application 'wkhtmltopdf', suggesting a lure for content that is then redirected.

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.ru/pify?keyword=alpha+male+strategies+pdf+download
    • http://files.figlearningcentre.com/uploads/1/3/0/7/130775516/3318973.pdf
    • http://files.greatneckepiscopal.org/uploads/1/3/0/7/130739802/diniwisunone-nugob-xovunux-menof.pdf
    • http://files.motnik.net/uploads/1/3/2/6/132695301/nujifulozibew_gilufelurepesu_davoruba.pdf
    • http://files.inspiredbybaking.com/uploads/1/3/1/3/131398308/8654568.pdf
    • http://files.motnik.net/uploa
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/rawagimap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/47242058754.pdf
    • https://cdn.shopify.com/s/files/1/0433/5573/4166/files/lesisumuzov.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/82557163712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/31513793518.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/59362933812.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/16654269862.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/19326166641.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/fisetudapajunaxuralasaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/88804006305.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/lesekurimadir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/54520860904.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_off00007cea.bin
52c0cfbcf74bbe3ea831f1e1856aeedc8846023c1b2228ab2774dbc3fde4e961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 5324 bytes
font_01_sfnt_off00008ee7.bin
7aa8e4b293f3ab66d7377960ca15d0f69c6a920fff14822d8294d358a645f873		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE7 10504 bytes

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