Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5aab0b72a1d618a…

MALICIOUS

PDF

36.6 KB Created: 2020-08-14 04:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 250b29318ae6200e4ee433fd72eb8d6a SHA-1: 0626e2d56c7715a06e4c02cdeb531215867e22b7 SHA-256: d5aab0b72a1d618af0dfbd2e60f2afb82eceef3ce4c36d6d6a4680fe161df229
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a game trophy guide. The document also functions as a link farm, embedding numerous external links, many of which point to benign Shopify domains but are likely used to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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=arkham+asylum+ps4+trophy+guide
    • http://files.dftly.org/uploads/1/3/2/6/132681392/3388718.pdf
    • http://bujik.dididiphotography.com/uploads/1/3/1/6/131606490/rofekewus.pdf
    • http://jofoziban.komunitiruqyahsyariyyahsingapura.com/uploads/1/3/1/4/131453267/7306854.pdf
    • http://files.steamboatrockiowa.com/uploads/1/3/1/8/131858287/zoripurubogap-ginalatopo-nupukir-nipakife.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/spanish_family_tree_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/96655956508.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/bratstvo_crnog_bodea_sjene.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/cerro_rico_de_potosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/81484018287.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/45008826871.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/48366365197.pdf
    • https://cdn.shopify.com/s/files/1/0429/2709/5967/files/rudenifufedanepafexawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/marriage_certificate_online_download.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_off00004e59.bin
496ab9b30b49f0e886ceb4c8b97db99a570a0c3129b4d2fa3efbe9530ce42fd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E59 5616 bytes
font_01_sfnt_off00006155.bin
dba0bd3fbccf06b46661252da30c178a3cbafdd3185a3bdf56e7c3105efe58be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 10636 bytes