Malicious PDF — malware analysis report

Static analysis result for SHA-256 2658b7f69c901fca…

MALICIOUS

PDF

42.4 KB Created: 2020-08-24 07:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f0d86eb590ca8514e4092177c9d18f2 SHA-1: cdd8f92ba660cf55cef740370c05c18b1eda11bd SHA-256: 2658b7f69c901fcaf591540e596a42ddbfdeec24ffeccfd98dc97dad196d7693
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though obfuscated, contains text referencing 'powerpoint executive summary template ppt' and the malicious URL, suggesting a lure. The presence of a large number of embedded links, many pointing to Shopify domains, further supports the SEO link farm heuristic, indicating an attempt to distribute malicious content.

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=powerpoint+executive+summary+template+ppt
    • http://farajagid.azerperlite.com/uploads/1/3/1/4/131452958/binag-fadanuxuzax-wonulozabiw-vuwopogakir.pdf
    • http://wirekite.uluwatustudio.com/uploads/1/3/2/7/132740541/741422.pdf
    • http://files.maui5elementacupuncture.com/uploads/1/3/1/8/131856339/2450385.pdf
    • http://files.lhschoral.org/uploads/1/3/1/4/131409508/sofunenita.pdf
    • http://files.kellykeegs.com/uploads/1/3/1/3/131382032/375c7.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/da_form_638_apd.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/tawidivojababovimemume.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/47059745922.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/rinokijuniguxigakaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/395667921.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/xuxojifejakupetuziwufixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/19255341107.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/rasurafeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/kegedegajajazemimif.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/xawiwiwebapojefafuwelif.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_off000060a5.bin
93418b60c6c69ff4a9cd37ad976f884d655dab3a784cee7b26c58a2318cfcfae
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 5400 bytes
font_01_sfnt_off0000730a.bin
4c43ca52d62af907b86519a1080a866b7e70b35a84d66b370800f20a7a11f5b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 13008 bytes