Malicious PDF — malware analysis report

Static analysis result for SHA-256 af78ce0c9b137880…

MALICIOUS

PDF

59.3 KB Created: 2020-08-11 13:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e256234b2ca4e17d0fd177b55dd69551 SHA-1: 17efac4f7ef6271a7a131e1a918fef2bfc8bb7bc SHA-256: af78ce0c9b137880842fe8078e7f7d4b16fa36eeab78bc3e838c0309a20753e3
142 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One critical heuristic identified a malicious redirector link (ttraff.cc) which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the text 'Afspa act 1958 pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous links and the redirector indicates a link farm or redirection attack. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=afspa+act+1958+pdf
    • http://files.millyverchar.com/uploads/1/3/1/3/131398428/badutaguwaronu.pdf
    • http://files.paisleesfoundation.org/uploads/1/3/2/6/132683000/jaxapu.pdf
    • http://files.allstarclean.org/uploads/1/3/0/7/130776489/zewurozokijut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/fumavanepunodum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/44835040229.pdf
    • https://cdn.shopify.com/s/files/1/0433/7254/4150/files/attending_skills_in_counseling.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/92103719354.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/ambrose_bierce_occurrence_at_owl_creek_bridge.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/wisivotavapudul.pdf
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/segixowegelugur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/levopuboganewomugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/what_is_aspects_of_human_growth_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/mivobowipi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/nafenofafasajefed.pdf
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/definitions_of_educational_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/95198295599.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/kejiboxipixojolon.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_off0000a9ee.bin
0a5462174d5d1bb5936a03a753f844c00eeb1430007e7ab5152cc1337bb2aaf7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9EE 5536 bytes
font_01_sfnt_off0000bcd4.bin
0c7d46609e4f9c753bef7bc5916c6ac6807a200fa6b168a3f437465d5efcd481
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD4 10376 bytes