Malicious PDF — malware analysis report

Static analysis result for SHA-256 004f2ea39db744f2…

MALICIOUS

PDF

46.2 KB Created: 2020-07-30 15:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6657741430224369ec9302b1202252e SHA-1: 34ee0eb0c4bed09e74a978266d5586b5f1a58430 SHA-256: 004f2ea39db744f26fe37388a801ec40550b8bd30634b3e9a3eb21792b7aee00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to suspicious or known malicious redirector infrastructure. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these 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/wb?keyword=field%20experiments%20gerber%20green%20pdf
    • http://files.thegirlsatcarolynk.com/uploads/1/3/1/3/131380539/1425960.pdf
    • http://files.cfcedinburgh.com/uploads/1/3/1/8/131871698/xuvenogapu.pdf
    • http://files.thewaycommunitycenter.org/uploads/1/3/0/7/130739225/4fee1f4c523a05.pdf
    • http://files.canyonchapel.org/uploads/1/3/0/8/130873715/8419160.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/tugik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/56214045615.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/zazusatavonaxuket.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/rowujekigemebutavawon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/xetibomum.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/xasurufotumenef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/98822665180.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/sirobemivaxinape.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/puwogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/vukewul.pdf
    • https://cdn.shopify.com/s/files/1/0437/9072/9377/files/15914979835.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/welujefaxunafu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.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_off0000775c.bin
f7e30441c7e11de40a22f5a0e9473e61194be7442d043a65d2589cb625291ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775C 4992 bytes
font_01_sfnt_off00008836.bin
6441ad9b5b3072d4684f2d9a5accb90edf7cfddd754161a2388093fe0c5c392f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8836 10388 bytes

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