Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e89bc96b9bb2dd…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 19:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d4bed7210161c109054dad5331f3ba0 SHA-1: e7374baa1f0a80d38e23a1c5078f44182fe39088 SHA-256: a7e89bc96b9bb2ddd33890e58de4d3de11797e9ed143cc9249d657b9c84a646c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, suggesting a coordinated SEO poisoning campaign. The presence of numerous links to Shopify-hosted PDFs indicates a large-scale effort to distribute malicious content.

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=alternariose+de+la+pomme+de+terre+pdf
    • http://tudabo.beinghumaninstem.com/uploads/1/3/0/7/130738731/fodotobusiwo-lajakiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/49872199325.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/77223206324.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/cafeland_cheat_engine_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9478/5694/files/55132863348.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/35247488364.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/el_metodo_descriptivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/1995_ford_ranger_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/butuleg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/zoruliguxufaruzunubata.pdf
    • https://cdn.shopify.com/s/files/1/0435/6151/7217/files/pendidikan_agama_islam_kelas_11.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/2036587087.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/18402714161.pdf
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/gabukelijebutoru.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_off00005e8c.bin
a9e19bb67692916dc8712ec85dff17110421c6dac19fed111a8deef4845d242f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 5176 bytes
font_01_sfnt_off0000700a.bin
d832202955d9174a1202cc70b6812f117714c23cd745185fb0f41b658521ee16
pdf-font-stream PDF embedded font (sfnt) at offset 0x700A 10860 bytes