Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6e65f63454ec4f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 21:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7456999733bffe021ba3e68067b84df SHA-1: 77b622ce34fdc484d312deea850b543167d8a456 SHA-256: 2e6e65f63454ec4f8d5ba187e4c3e47c121c97ab5d0be8bda5e10d16e96af49f
154 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 pointing to 'https://ttraff.com/pify?keyword=railway+reservation+station+code+pdf'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external PDF links, with the first being 'https://cdn.shopify.com/s/files/1/0432/7420/7387/files/35189900265.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The primary intent appears to be redirecting the user to a malicious site via the embedded link.

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=railway+reservation+station+code+pdf
    • http://files.loriellaschukrmt.com/uploads/1/3/0/8/130813514/dozabufa.pdf
    • http://files.tailoredtrainingnarberth.com/uploads/1/3/0/9/130969680/vujabemagofas.pdf
    • http://files.dragonflypaddleyoga.com/uploads/1/3/2/6/132695694/276668.pdf
    • http://vovaviv.healingnotesllc.com/uploads/1/3/0/8/130874655/butixesepove.pdf
    • http://files.warwickchinese.com/uploads/1/3/2/6/132696015/5a5297b4651de.pdf
    • http://files.warwickchinese.co
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/35189900265.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/xejokulokowukev.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4435/files/73115472575.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/rifuximefobaziwiduj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/exercise_for_back_pain.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/chemistry_formula_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/american_horror_story_s06e07_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/kawozer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/zumex.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/33682211813.pdf
    • https://cdn.shopify.com/s/files/1/0428/4284/9446/files/wejebok.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_off00006880.bin
a90f576593be04a371e06054b2b72492b8e862e870bb36eb7d2d25a3dc8abc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6880 5408 bytes
font_01_sfnt_off00007b18.bin
46e53388ffe9647e405604823028542454e6b18c984861cb8fdf5d613a01945c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 11628 bytes

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