Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4cc6e2172c4186…

MALICIOUS

PDF

42.4 KB Created: 2020-08-17 15:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f2540d2eef6a02d65d581fefdce1437 SHA-1: 5ff0335de943965e20ebc9bad1356d2ca0093380 SHA-256: ee4cc6e2172c418649360360606667d247c6e3309b34320f559710d3e20e4441
152 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, specifically pointing to 'https://ttraff.com/pify?keyword=music+to+apple+watch+3'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the 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/pify?keyword=music+to+apple+watch+3
    • http://files.doadagny.com/uploads/1/3/1/6/131637385/5248828.pdf
    • http://zuwetara.dawnsmithangelicreiki.com/uploads/1/3/0/7/130775085/davutuve-nutajowuduxef-mubewuxojaf-palilolot.pdf
    • http://reteduji.tripsandtours.com.ar/uploads/1/3/1/4/131438345/2954711.pdf
    • http://files.dovergreekfestival.com/uploads/1/3/1/1/131163601/vefedifiveposufole.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/descargar_biblioteca_del_evangelio_sud.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/mobomarket_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2657/files/30851262488.pdf
    • https://cdn.shopify.com/s/files/1/0434/3745/7574/files/80334855630.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/punefafiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/tidinekemobomul.pdf
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/82455597114.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/54884747036.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/types_of_bar_glasses.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_off00006738.bin
b7a88142b51cb5277b04fb24c9fe7c3b432f698ee76557b296e7c47c19ceaf13
pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 5188 bytes
font_01_sfnt_off000078f1.bin
5396c01ebcfaf2ee3b88764f4d77b5abb524f19679d5ca8db98f033bca471475
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F1 10576 bytes