Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d254aab423dafb5…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 17:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29138cc395e798f65fdbf5633d30a01f SHA-1: 4051e9181271731300ed4cc40b75884ea82cf854 SHA-256: 8d254aab423dafb5eedabd84101a3b2abc05c97bf02807d84ab127b5e4a4031e
154 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.link/wix?keyword=louise+hay+affirmation'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and references to affirmations, suggesting a lure for a scam.

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.link/wix?keyword=louise+hay+affirmation
    • https://static.usrfiles.com/ugd/b8c837_dfaa338034b746f7a4c2e5beacc168d9.pdf
    • https://static.usrfiles.com/ugd/73c254_57490338276e468db35ff38a39a0520b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb1e6880f2654da2884085ebdeb17af9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6be1c08ab6f04fba8c62b1b55f411067.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/vidmate_app_install_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/xekikolasarisimimaroz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6214/6710/files/music_mp3_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/83088948728.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/niwalixetusagekaguj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mowajuvide.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/76608521038.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/xigiwijilow.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/44960489677.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_off000060fe.bin
5e750ed9326043c6c930f3cf0fea5952d4899f56a05e192f9bef6edf84bcd8fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x60FE 4900 bytes
font_01_sfnt_off00007184.bin
b6c63d64fc9d793054144174b45558de73047134711d45baa74b604b233c6358
pdf-font-stream PDF embedded font (sfnt) at offset 0x7184 9440 bytes
font_02_sfnt_off000091b9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B9 4324 bytes