Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d569ee311cf68d8…

MALICIOUS

PDF

95.9 KB Created: 2020-08-07 19:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42be3a08242841ca5090afa1051971b6 SHA-1: 222535ec01311b5d21f022b4c4f2be21a72fecb0 SHA-256: 5d569ee311cf68d8c017d966b035c7546041b8b4fa1ae643b3ca390bfbac8d79
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host further malicious content or phishing pages. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly indicated maliciousness.

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=famous+english+short+story+pdf
    • http://files.guelphpropertymanagement.com/uploads/1/3/1/3/131379174/nigowenazoduta.pdf
    • http://files.artgrunt.com/uploads/1/3/1/6/131607232/bidowewutavabeji.pdf
    • http://files.thebrooksideinstitute.net/uploads/1/3/0/9/130970003/1209803.pdf
    • http://files.highstreetmediaproductions.org/uploads/1/3/0/8/130814258/lemixilarif-tusinig.pdf
    • http://files.marco-pelliccia.com/uploads/1/3/2/6/132682862/fimezidafakadi-xewupud-wezevisuterep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/zuxapox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/sujerabadafekoxazuwin.pdf
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/98714255365.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/sims_4_angel_wings.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/27489667019.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/87282503511.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/dekipubizanufejisez.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/zojupemig.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/dinikiniruzugaferikoji.pdf
    • https://cdn.shopify.com/s/files/1/0436/1266/8066/files/10578232265.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/causative_verbs_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/blank_caribbean_map.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c4e.bin
74822e3e7271f1fbb6aa6ace91d79e4b5d8b8a0901efe99d904e9a306faa3047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4E 5512 bytes
font_01_sfnt_off00014eef.bin
5d196ef863f6d52ba6c797e05acfda62129162bcefa61f18abd12a555a2d2407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEF 10352 bytes

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