Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3519960d86ba70f…

MALICIOUS

PDF

58.0 KB Created: 2020-08-04 21:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8cb82110de8fedb1a403346e06c832 SHA-1: 3b337983bb460a20fa6c0652cca3dcd8a1d4204f SHA-256: b3519960d86ba70f3aec7be7f1c0e0b7364efbf6fc6a4d1eff76deb43564fece
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other Shopify links, while marked as benign, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=beauty+and+the+beast+musical+score+pdf
    • http://files.livingwellwithcfrd.com/uploads/1/3/1/3/131398109/1078455.pdf
    • http://files.sandringhamgolfclub.org.au/uploads/1/3/1/4/131438113/2b5bc3a.pdf
    • http://newar.mmedejong.com/uploads/1/3/0/7/130740072/zobaj-tidesi-zowubowazokan-dunamitorobeto.pdf
    • http://files.loaraband.com/uploads/1/3/2/6/132681325/jitino-nikibo-jaduvag-rajijekenefeki.pdf
    • http://files.infiniteusrocksandjuice.com/uploads/1/3/1/1/131164204/majazejale-vezivedubezufu-bisudabi-sufobabosijo.pdf
    • http://files.livingwellwithcfrd.com/uploads/1/3/1/3/131
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/drew_seeley_and_selena_gomez.pdf
    • https://cdn.shopify.com/s/files/1/0429/4672/3996/files/zitafoxinimajidepu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/rozexosipuxuti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/55134824907.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/xolunelanamuluv.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/pakudivinosupubi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/extend_adobe_trial.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/biwaxef.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/13667739117.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/puwonadabag.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/posowawemikorenetirobomok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b7d.bin
792f962836de551448ac79c3884a313c131fab831833f1efda87b999051aa526		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7D 7112 bytes
font_01_sfnt_off0000a3c4.bin
188c39600335525610369c62e26274e4d486cc8cc2908dc785c06b2d29fd6894		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C4 5688 bytes
font_02_sfnt_off0000b6f5.bin
917da9dfc66a7d3261ac4565b1066d50a1425055df68bf485193963bd9b7fd91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F5 10220 bytes

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