Malicious PDF — malware analysis report

Static analysis result for SHA-256 970b6337730ba9ee…

MALICIOUS

PDF

43.6 KB Created: 2020-08-24 04:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d92658b2ae3a2eb66fb68ba9fc868eda SHA-1: 8cf17af21a3283d880685b8bf627b3c0360bd5e5 SHA-256: 970b6337730ba9ee63411c1af25a9c4e6f962e93cb67e847eaac56adce95d403
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 pointing to 'https://ttraff.com/pify?keyword=drilling+3+4+hole+in+sheet+metal'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a 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=drilling+3+4+hole+in+sheet+metal
    • http://files.devinjamesbaldwin.com/uploads/1/3/1/8/131871555/duzavewuxizuku_gafejasotiw_nudup_laravus.pdf
    • http://files.fleenorfamilyadventure.com/uploads/1/3/2/6/132683001/a71e00d5cdb44d.pdf
    • http://pederod.belliesandbundle.com/uploads/1/3/2/3/132302944/dokut.pdf
    • http://files.impact2success.org/uploads/1/3/2/3/132303373/nujepodag_lowozusizu_vulezo_suturazapedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/katavogexisugo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/7464175607.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/vewozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/86458793052.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/bodo_songs_tk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/xikaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/44423001238.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/nordictrack_c900_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/computational_and_algorithmic_thinking_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/tirobeza.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_off00006ce1.bin
f03034d96df76724c0c8716a85e6663e383855dba8dd01466d0e79a3b21bd02d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 5348 bytes
font_01_sfnt_off00007ee4.bin
47c81a8403d9d46b8fe8f30cbb7c1b1db3a8eebb1997dd327f4043a50ed21e4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE4 10240 bytes