Malicious PDF — malware analysis report

Static analysis result for SHA-256 5189bbfd919f0028…

MALICIOUS

PDF

56.4 KB Created: 2020-08-10 03:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e19773a8e38f4a6407e91b07506fe970 SHA-1: 0393426e90aba599b7db89fd16df260c1fdb5857 SHA-256: 5189bbfd919f002826dfad993ffe3bfe8c6058abdbc04a6905a8d50f909ad901
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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=definition+of+substance+abuse+pdf
    • http://files.crowsnestcoffeecompany.com/uploads/1/3/1/0/131070109/rukule.pdf
    • http://files.hamiltoncofairgrounds.com/uploads/1/3/1/6/131636642/purudunifob_bulebitesibad_xafofelu_nizopugudax.pdf
    • http://files.gemenvironmental.org/uploads/1/3/1/8/131857679/4122550.pdf
    • http://files.seamstobedone.com/uploads/1/3/1/4/131453674/powubatefonapizufato.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/81943489067.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/joniromosomagana.pdf
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/goleforowosunifoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9034/files/wividafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1706/files/nevotow.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/tomaso_albinoni_adagio.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8023/files/weromefujati.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/95348475669.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/naleganajakabiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/99913946226.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_off00009eaa.bin
80eb10fca4fe353a5141c37c2dea80f6c65b0794240d2644f5f49a34766c2d48
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAA 5160 bytes
font_01_sfnt_off0000b04e.bin
149b40956de3eadb85bb4d2c98ad77bcd7086360e877c50b652935be53380694
pdf-font-stream PDF embedded font (sfnt) at offset 0xB04E 10600 bytes