Malicious PDF — malware analysis report

Static analysis result for SHA-256 4967e4218ee0d01c…

MALICIOUS

PDF

46.5 KB Created: 2020-07-30 15:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06bb02d14dd958305e0a2f7e2a0a694 SHA-1: 48e7bebfe78b7497b1a366ce3b73498a7a0e343c SHA-256: 4967e4218ee0d01c66bbfa5d4570da1d68993d638879c5adade52bd2635b8797
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector, with numerous embedded links pointing to external resources. One critical heuristic indicates a link to known malicious redirector infrastructure at 'ttraff.com'. Another heuristic identifies a large PDF link farm, with the primary link leading to 'cdn.shopify.com'. The ML classifier strongly suggests maliciousness, supporting the conclusion that this PDF is designed to lure users to potentially 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.com/pify?keyword=michael+scott+alchymista+pdf
    • http://files.mtviewcrc.org/uploads/1/3/1/8/131871515/dofebekuwosuxoka.pdf
    • http://files.oiltankremovals.com/uploads/1/3/1/6/131606798/3379410.pdf
    • http://files.romehospitalfoundation.org/uploads/1/3/1/3/131380870/rumipeni.pdf
    • http://files.sexualityintheolderadult.net/uploads/1/3/1/4/131407629/165636.pdf
    • http://files.christumcutah.org/uploads/1/3/2/3/132302768/6066217.pdf
    • http://files.christumcut
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/bulakobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/besulatudejevote.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/7358872406.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/16541707810.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/zeninobikuxitetozoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/pugewusuzer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/69406424205.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/89041011670.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/89649930359.pdf
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/24991745893.pdf
    • https://cdn.shopify.com/s/files/1/0435/7059/3955/files/92871886076.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/63354703354.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/56832938977.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_off0000790a.bin
7a15857655712351db5becb646a764a95abef17d2d991fa25c864102d222cdcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 5088 bytes
font_01_sfnt_off00008a66.bin
421b3c04f9163f2cf06ea0283a53814ff4c0674d65604d4a22ec3fedda48e1f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A66 10056 bytes

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