Malicious PDF — malware analysis report

Static analysis result for SHA-256 2706c1cccadf5432…

MALICIOUS

PDF

39.5 KB Created: 2020-07-31 17:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102f40866fcca0ef2d9e81c48e32b5f7 SHA-1: e214121c6c2b5f656154c0c1ce8154940d114289 SHA-256: 2706c1cccadf5432b7c043763bf0816fe1d1ea2eb2d3d5e84f11f10907375c31
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=game+activity+discord'. This URL is presented within the document body, likely as a lure for the user. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous other PDF links, many hosted on shopify.com, suggests a link farm or distribution mechanism. No scripts were extracted from this sample.

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.com/pify?keyword=game+activity+discord
    • http://files.writingforthemaster.com/uploads/1/3/1/4/131437633/jusurup-limupabima-xavefoziforan-dafuzo.pdf
    • http://files.journeyandbloomyogadoula.com/uploads/1/3/0/9/130969896/kexopanuj.pdf
    • http://files.troypreschool.net/uploads/1/3/0/7/130739871/wuvawenudumasep.pdf
    • http://files.scaffolddawgs.com/uploads/1/3/1/4/131438308/wanugun_nuranula_juforoxirup_xigevobekep.pdf
    • http://files.nvarealestateresource.com/uploads/1/3/0/7/130776205/bovopidaxebawogi.pdf
    • http://files.troypreschool.net/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/31365556568.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/83359222684.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/80323094414.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/57494122703.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/51127798047.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/dodovezuxakusafejok.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/14848221770.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/ziburuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/45052228538.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/1664187201.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_off00005d52.bin
82265883f085fab86a4d153ce358169a752307f518f8c321b9dd25d1fffe407c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D52 5248 bytes
font_01_sfnt_off00006f23.bin
391cf5c4a06acf6fbb94896178b851d5d016db3dfa61ab481cdeffb851c52e33
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F23 9928 bytes