Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0027d73e4339769…

MALICIOUS

PDF

51.3 KB Created: 2020-08-28 06:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6888a798a11da8781e575dab8c43522 SHA-1: 3353c78d3aebdc72c3d88e2fe1d2c37db50da174 SHA-256: f0027d73e4339769d323f941e7fc57efe58416ff8d329f038621cbcdbdcf4d27
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, pointing to 'https://ttraff.me/pify?keyword=3.+5+warshaper'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text but the malicious URL is clearly visible within it.

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.me/pify?keyword=3.+5+warshaper
    • http://dedipe.grandmassoapandstuff.com/uploads/1/3/1/4/131483109/5299864.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/59518965407.pdf
    • https://cdn.shopify.com/s/files/1/0439/0046/9403/files/67984029561.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4647/files/reading_blue_coat_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0461/0611/6260/files/whirlpool_slide_in_gas_range_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/56305714525.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/english_vocabulary_in_use_upper_intermediate_with_answers_michael_mccarthy.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/24353234899.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/grammar_check_sentences.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a8d.bin
e118fffa39ffa55a1289d3e0c1037c087eab17ba6da864e3952af32ec0d21581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8D 5192 bytes
font_01_sfnt_off00009c3d.bin
46b0c183d759c8eb6d6a1c1e0b2d6660cc041b4443315eccdf1a8dcb9e3a13ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3D 10908 bytes

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