Malicious PDF — malware analysis report

Static analysis result for SHA-256 344097daa809e2dc…

MALICIOUS

PDF

67.1 KB Created: 2020-08-18 13:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 585d896bc0f3be121fca1dded9d1fbbe SHA-1: d7b87352716c1dcb703a8a1bd8a52b55d5343540 SHA-256: 344097daa809e2dc664b1998d373cf89dcf448357b9862a246754fd89166f9e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to programming and a URL that mirrors the malicious redirector. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or to serve further malware.

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=convert+base64+string+to+pdf+in+angularjs
    • http://jodoseno.cabosuvrentals.com/uploads/1/3/0/9/130968984/cf1da8.pdf
    • http://romim.upayaconsulting.com/uploads/1/3/1/3/131383329/5887720.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/french_to_tamil_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/risetifijoxinoravu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/lokife.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/barbie_rapunzel_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/32444884907.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/vuxesebal.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/fexeligu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/bafang_bbs02_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a758.bin
6049f870d245e1a44012afb3c0efc11898d9005d49e6fe986f73dbaad3f3100b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA758 5632 bytes
font_01_sfnt_off0000ba9b.bin
14809a146c395885d6addbcd1599d4fcf3a8b5f901288c26dcfbfd0d68998acb
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9B 17604 bytes
font_02_sfnt_off0000f11f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 4324 bytes