Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd2a354a9dc58ae…

MALICIOUS

PDF

45.9 KB Created: 2020-07-27 17:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cadc99e9c406e609161eddffe56fbcf5 SHA-1: d0a044a6ddcfa201352dc305aace262938d3286a SHA-256: dfd2a354a9dc58ae7568f8d2868b4bc438da8937c225b3eb915537d3797b194f
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to malicious sites. Another heuristic indicates a large PDF link farm, with many links pointing to Shopify domains, suggesting a coordinated effort to distribute malicious content. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its specific lure.

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.cc/pify?keyword=integrated+math+1a+answers
    • http://files.rawlinsmusic.co.uk/uploads/1/3/0/7/130739544/vojumif-vumamawuxefuj.pdf
    • http://files.teamaudioeye.com/uploads/1/3/1/4/131438423/78daa69ac0c759.pdf
    • http://files.ownerbuildercourses.com/uploads/1/3/1/3/131379732/d06de.pdf
    • http://files.rawlinsmusic
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/4921514353.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/23191568868.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/39453785990.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/zudebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/tovasojopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/65056592103.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/31103223222.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/39851111751.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_off0000750e.bin
e49567ab2b4e270bef67b0ca02deaf049cae3e0cebc3a0fcf216dd9494f1b929
pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 4916 bytes
font_01_sfnt_off00008598.bin
25cb4f90ef56fc0861e20e1a564813a6f24c164b9abae810cb3b59fd3116e8b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 10880 bytes