Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78b2aa664ecc945…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 22:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dca5194252d41097bab7614e5138f62e SHA-1: 62527936d73a0691296170e3116391f707f60670 SHA-256: e78b2aa664ecc945611449f88ef7a0704b22eb873551ab606aee614d495fd135
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are associated with malicious redirector infrastructure. The document body contains garbled text but includes the suspicious URL, suggesting an attempt to disguise the malicious intent. No scripts were extracted, but the extensive use of external links points towards a delivery mechanism for further 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.ru/pify?keyword=livre+anglais+traduit+en+fran%25C3%25A7ais+pdf
    • http://files.ramsgateswissys.com/uploads/1/3/1/3/131383630/b8035b6b893aa44.pdf
    • http://xuleruv.harrisburgtroyhistoricalsociety.org/uploads/1/3/0/8/130813821/6bc6a.pdf
    • http://files.younglifemanateecounty.com/uploads/1/3/1/3/131383924/1960506.pdf
    • http://files.image1st.org/uploads/1/3/1/4/131452922/0941cbbb3aa1cb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/matapuwemexudosew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/zapipozuzewibadutotav.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/nugipixevuxadutibixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/77822723803.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/50717065525.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/jomamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/7643057618.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/mudawebovutuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/29600125760.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b15.bin
4bfc8e9dd81830bd09b039e4a571ca7f041a9bed3369a1af5f430e543bfd4398
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 5164 bytes
font_01_sfnt_off00006cb8.bin
291fb65b44358d3bc442895c54adcd516e01e725b598e994f817ed547af0bd59
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 11432 bytes
font_02_sfnt_off000090f6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F6 4324 bytes