Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd482783ec092072…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 21:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6647aec3a02eed7de8a5a299fd493c3 SHA-1: 7b876d4271b6be6526778e8b57be770aa23133f6 SHA-256: fd482783ec0920721fb40bf26efdc4adf15ba71616a1942a020e5a0d212066c7
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to direct users to harmful 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.cc/pify?keyword=chief+information+security+officer+license
    • http://files.matakanacommunitygroup.online/uploads/1/3/1/3/131384070/6366111.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/47135465458.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/zufebexigi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0620/9702/files/zonarajixid.pdf
    • https://cdn.shopify.com/s/files/1/0440/2819/9062/files/likoguxevupod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/27984840663.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/virtual_job_board_uiuc.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/83735066094.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/xokolazatewugi.pdf
    • https://cdn.shopify.com/s/files/1/0463/4660/0605/files/dengue_guideline_thai_2017.pdf
    • https://cdn.shopify.com/s/files/1/0451/1003/4597/files/20007548415.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/kurixinunaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/27129576703.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_off00005d8e.bin
0601251c83f4bca1e55b5a0d05a965a96b42c8b01571c7f2a90c7c0a91cd96e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8E 5128 bytes
font_01_sfnt_off00006ed0.bin
d7e73d95351c50827ef8f844a6e164d462441f5d93ed869bb7d1402a841327fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 9792 bytes