Malicious PDF — malware analysis report

Static analysis result for SHA-256 6799dc9ab8940aea…

MALICIOUS

PDF

75.1 KB Created: 2020-08-01 16:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e0d33ceb5adf00a791e50129f2d261 SHA-1: a0f1a7df4efcc573996fddd2e97603ba1c820d86 SHA-256: 6799dc9ab8940aeaa2f29b793824d1c710d0ccbcb507613fdd4ee925a31991ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=best+mage+leveling+spec+1-+110'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the link farm structure suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

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.cc/pify?keyword=best+mage+leveling+spec+1-+110
    • http://files.spiritofgoldenjoinery.com/uploads/1/3/1/0/131069819/3613563.pdf
    • http://files.hrr-poa.com/uploads/1/3/1/6/131637570/6f4e24644c3f.pdf
    • http://files.santachester.com/uploads/1/3/1/6/131607053/sagop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/11416990884.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/surubibexubemubejegumige.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/22517889825.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/79980795718.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/sazetezenowezunidutavab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0409/0777/files/86371036390.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/rajuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0469/files/66837020189.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0042/files/xisevulipe.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_off0000def0.bin
6019b4e93a584f6ce79e08b785dafdf5844a3e05d5af9d7674a974f5f0647426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 5492 bytes
font_01_sfnt_off0000f1a0.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 1800 bytes
font_02_sfnt_off0000fa2d.bin
579c7b595c3f30a35dd4337153ad8f5cb8dc2bbddfd6182988024fbe7f9d36bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 10792 bytes

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