Malicious PDF — malware analysis report

Static analysis result for SHA-256 b252345ba1fd8bf3…

MALICIOUS

PDF

49.1 KB Created: 2020-08-14 13:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33363a0fc6c70ee40406758857bcc0c5 SHA-1: d4da033d9780a1d822c9f1e4419d3b6a212bf7d0 SHA-256: b252345ba1fd8bf3c6e45bc05e5440390abe5af84aa119177228d3d746cb463b
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 ttraff.com. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body contains the malicious URL, suggesting an attempt to lure the user to a potentially harmful 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=adjective+forms+are+positive+comparative+and+superlative
    • http://mirulima.commerceelementarypta.com/uploads/1/3/0/8/130814411/zajinusek-bapez-dadifisegazoras-wukatikux.pdf
    • http://files.finddani.org/uploads/1/3/1/3/131379875/zateletaresu.pdf
    • http://files.appledoreantiques.co.uk/uploads/1/3/1/4/131406258/6897320.pdf
    • http://files.forgebeartanks.com/uploads/1/3/2/8/132814929/096fb7ae.pdf
    • http://files.questforreadingsuccess.com/uploads/1/3/1/4/131406717/d72c09e1f2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/38697182129.pdf
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/voxonigerebu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/41573281063.pdf
    • https://cdn.shopify.com/s/files/1/0432/2666/1023/files/how_to_git_push_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/byzantine_art.pdf
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/84690502941.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/17885480658.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/ipl_2020_match_schedule_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/pefobefomelap.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/86868611038.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/wukogigikoruzab.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_off00007ba0.bin
3265f3ca6687eee30d63960d4b6a4afab245f4a0520a0b808e15894a5e143cec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA0 5424 bytes
font_01_sfnt_off00008e03.bin
5404922b9d8d05ba35a1e113841ecceabc8c5635d5241223feffdb89f74a7d43
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E03 12772 bytes