Malicious PDF — malware analysis report

Static analysis result for SHA-256 064d2d4d862fc8cd…

MALICIOUS

PDF

41.2 KB Created: 2020-08-27 17:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83c1c34e88227d9c544599506d38eae3 SHA-1: 7798fe7fb61e14dd76738b14455f6c6364b2cfcc SHA-256: 064d2d4d862fc8cd4d2b537752a8d74bc65a8a3bfd8c65b4270b6e806e0e5082
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it hosts a large number of external PDF links, many of which are benign but some are hosted on suspicious domains. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=exemple+dossier+cap+histoire+g%25C3%25A9ographie', likely serves as the initial lure to a malicious site.

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=exemple+dossier+cap+histoire+g%25C3%25A9ographie
    • http://tapasekup.moonhighclassof1971.com/uploads/1/3/1/6/131606289/d4ad008315536f.pdf
    • http://mudet.vividconnections.co.uk/uploads/1/3/1/4/131408024/gutokibetala.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/3207/3624/files/vatuxadaku.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/pilutudoxelofulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/american_english_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6107/4337/files/pafef.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/organized_crime_investigation.pdf
    • https://cdn.shopify.com/s/files/1/0460/3025/8335/files/langston_hughes_salvation_purpose.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/repepaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/88643383789.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/minecraft_team_extreme_launcher_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/53464248181.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3510/files/bhajan_song_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/53323741236.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be0.bin
47ad8282ac95851aa2ef8769590bad84667cbef8d37b5c8103385eec2b3fe56f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE0 5656 bytes
font_01_sfnt_off00006eb6.bin
528ccfba1d92e25126cedb7bc019e071d2a01d641bb4c7999b1ee0e8673fd422
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB6 12284 bytes