Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b4157c23e92001…

MALICIOUS

PDF

42.0 KB Created: 2020-07-27 21:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12f8ada13fd15aafd69d66ffb84a8fc8 SHA-1: 4e989b0189ad1a271ad14ff4b4a0b3b0865eedcc SHA-256: f2b4157c23e920011355db119fc9c9087d0d2d844268a8aaa71957fd78eabafd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, with the first being 'cdn.shopify.com/s/files/1/0432/2885/6487/files/risedugesugiluve.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to a manual, likely a lure.

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/wb?keyword=manual%20for%20bissell%20powerforce%20compact
    • http://files.sportsstarsskillsanddrills.com/uploads/1/3/1/6/131606035/bosakawuwurane.pdf
    • http://files.mccarthyphotography.ie/uploads/1/3/1/4/131406140/binuvufiz.pdf
    • http://files.williamrudolphfaulkner.com/uploads/1/3/0/7/130738755/todunu.pdf
    • http://files.stephanie-hixon.com/uploads/1/3/0/8/130813829/9332440.pdf
    • http://files.lyricsandpoems-cacreed.com/uploads/1/3/0/8/130814351/e60d8a4e.pdf
    • http://files.sportsstar
    • https://cdn.shopify.com/s/files/1/0432/2885/6487/files/risedugesugiluve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/3571047208.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/razubovifulizelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/99636485591.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/2217687531.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/zogozutuzaluzesefibup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/93357545198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/83369642441.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/52242949627.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/bigowijimawobetasuzer.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_off00006675.bin
90c2ea014d4b856ce20bb73bc682a4c400e2e25e4d297308f3a836ac0d379024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 5280 bytes
font_01_sfnt_off00007864.bin
01e5cca2a3a9135e340db318d45ce58af0d34da1de668ffa55838c1db2417dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7864 9980 bytes

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