Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cca696bcb6adb5…

MALICIOUS

PDF

37.8 KB Created: 2020-08-29 10:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faac57fb5993b983e72d7f3d73ee9437 SHA-1: 6c2647191fa5bcdf002125550680b5d8ab049cc6 SHA-256: 28cca696bcb6adb589bcbd77a2b15a43a171da748db86d3d7e377f946f8e5861
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'https://ttraff.cc/wix?keyword=agfa+silette+manual'. This indicates a likely phishing or malware distribution attempt, leveraging a link farm to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wix?keyword=agfa+silette+manual
    • https://static.usrfiles.com/ugd/b8c837_85e335e89242484e805564d06a3c0338.pdf
    • https://static.usrfiles.com/ugd/b8c837_04cff1fba101469d8086848e1e7b3807.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b386d4fea1f4f8880ee482204dfd440.pdf
    • https://static.usrfiles.com/ugd/b8c837_114e5d7d0dcc4541a4bc9ba8b55104f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f638475c55ef479c915449acb3f40f13.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/norimowigagidulem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/6290429240.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/22218375388.pdf
    • https://static.usrfiles.com/ugd/b8c837_83fcb31cc3a840999767196fe3a40d43.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c10706f4274681a2791097c196dca5.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/22749146060.pdf
    • https://cdn.shopify.com/s/files/1/0438/0613/0337/files/arion_lightning_xs_performance.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_off0000487e.bin
3056f92bf3eecbd3995f5f0cb8ba82c81a8d3fcd7d62c1c476d2758781e7efb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x487E 4752 bytes
font_01_sfnt_off00005891.bin
545bac51675014fc9823d92ce7bf798ccaf836125d38140a6704aa8e4cd06eef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 10512 bytes
font_02_sfnt_off00007c82.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C82 4324 bytes