Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15a0559ac4a2cac…

MALICIOUS

PDF

98.2 KB Created: 2020-08-01 14:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7f0c83034b58d4fe7d7600c795e155a SHA-1: 760986a15c900b9519b15f3c728907e40385568c SHA-256: e15a0559ac4a2caca87c8992845bb5c8385e451f67cc767fbeb44bd51821627c
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=blood+hunter+order+of+the+lycan'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to direct the user to this malicious site.

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=blood+hunter+order+of+the+lycan
    • http://files.saugusxc.net/uploads/1/3/2/6/132695543/goloxiv-mired-zakobegoselaten.pdf
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • http://files.sedonaweddingessentials.com/uploads/1/3/1/4/131453062/gajove_mosode.pdf
    • http://files.eflenglishdaily.com/uploads/1/3/0/7/130775862/c9c85e1e9.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/zosabikuvikas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/81386148275.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/2977036248.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/48071218088.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/84183433858.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/50336945347.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinupagudesezubinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/33646809558.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/85042385153.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/95934048539.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/10422511874.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/linorawuruwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/66839870083.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/29041950917.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_off000146cd.bin
852d4ea9b81722aeff2c0c19e64254e31af8dbd712b9406ea8df6369a7c1bd63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146CD 5084 bytes
font_01_sfnt_off0001581a.bin
9d3ab19e7c1e4ad6fbed91fc44b65c2e4d8f71b659dd1b980b7b0fcbff8f8871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1581A 10304 bytes

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