Malicious PDF — malware analysis report

Static analysis result for SHA-256 9830123c1f3080d7…

MALICIOUS

PDF

50.8 KB Created: 2020-07-31 08:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e118b9d38759c1e5718c8481e02df613 SHA-1: 34f93ec8539685e12382dc4ba3d2f5ec1bf183a2 SHA-256: 9830123c1f3080d70581f640707843e3c27ddf9cff4190b156e544cdde574795
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, suggesting an attempt to create a link farm for SEO manipulation. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Pdf to ms word software download', reinforcing the lure. No scripts were extracted from this sample.

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=pdf+to+ms+word+software+download
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdf
    • http://files.mtbafrica.com/uploads/1/3/1/4/131482968/purelap-tilizogoxibax-vuxigorajiwete-roxus.pdf
    • http://files.sequoiavalley.com/uploads/1/3/0/7/130776180/teserufiwewuti.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/pamutosipevunejesojemuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/gonuvirewemixomuvovinugev.pdf
    • https://cdn.shopify.com/s/files/1/0434/8605/2518/files/loxibomamina.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/14401850567.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/78130212903.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/97894325925.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/31841273091.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/wituropunobatudiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25781613666.pdf
    • https://cdn.shopify.com/s/files/1/0435/6918/4931/files/9682800590.pdf
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/31748507968.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/28898189519.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/vujololorafolafemijemi.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_off0000897a.bin
9c57012f5aebad819a05e7be2027c18856018e20541edba4546fff52141236e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897A 4884 bytes
font_01_sfnt_off00009a00.bin
6217fd54c91322e646b6df8380dfe5518ef5a87033ae1963a0305cefabd6479d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 10340 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.