Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a8e0fae1ee1c91…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 07:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd8462c496ef8a4b016d2c8c257b8c5c SHA-1: 496edce453eb688eee81f8fb15d960b298d1d417 SHA-256: f6a8e0fae1ee1c913ad1580c5345e51736b7a3265a9725004a52433717868631
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, a common tactic for link farms and redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'ttraff.com', a known malicious redirector. The PDF_SEO_LINK_FARM heuristic further indicates a mass of external PDF links, many hosted on Shopify, suggesting an attempt to obscure the malicious intent. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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=things+i+wish+i+d+known+before+i+got+married+pdf
    • http://files.racketeerrobot.com/uploads/1/3/0/7/130739982/6442442.pdf
    • http://files.chapel-associates.co.uk/uploads/1/3/0/8/130874633/5411306.pdf
    • http://files.roxieriverawriter.com/uploads/1/3/1/4/131407423/wanonajipaxibeva.pdf
    • http://files.jerronjorgensen.com/uploads/1/3/1/4/131407635/1d1c404d1f4d7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/71747320127.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/satibajepibedowobiwajet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/bopodebafujasamal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0586/2307/files/82237989057.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/96571974746.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/safexifazaveretip.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0726/files/40335988972.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/zekibiwukusupipibopipi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/93397609907.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/simamera.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_off00006f4c.bin
06ea3ce7ad64f749267d8f6a032c1245417bd9757653757d3855afd488cfec65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 5668 bytes
font_01_sfnt_off0000827a.bin
841dc837e28efd344f4c78bbcb08b47acc4da5dc7f11f2bdc36de754264bbce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 9928 bytes

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