Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f569a2737e1301…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 17:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec0082bbe6ecfab6b40a034d7a7ced3a SHA-1: a1a0bbf149262bd1e3a36c4a675a56049e2f86be SHA-256: 13f569a2737e13012b4f26496215c02d836c321fbbef3db30c9358b6500f6a73
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.me, which is likely used to funnel victims to malicious content. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are benign but serve to obscure the malicious intent. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

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.me/wix?keyword=bedava+porno+video+ile+porno
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_5cdb6847933b43199d51d19747e5f3ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a1f6474fed54c249223072402c99dc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b1c3a4a488b449f858988c12aeafdd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa6b8dff86a4d399fb9527455677dd3.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/xidubozef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/past_simple_irregular_verbs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/vekugijapefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/rugagefexaxedamafedi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/bajekegajarupazo.pdf
    • https://cdn.shopify.com/s/files/1/0445/3587/3700/files/capital_budgeting_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/85493444948.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/82175619047.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/kosunisaduko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004feb.bin
c697c9f0b8fe3c7eeb1cb201f205a411eadece8baff8b0e23bd46956e659512e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEB 4624 bytes
font_01_sfnt_off00005fa1.bin
d1d696055d7171f0a0d85d728c90986046f2d726fc172414a5238f0583ba62d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 11204 bytes
font_02_sfnt_off000082cf.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 4324 bytes

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