Malicious PDF — malware analysis report

Static analysis result for SHA-256 399c9500a934d371…

MALICIOUS

PDF

42.7 KB Created: 2020-08-14 16:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1e9684206f5c172e5b9623953041213 SHA-1: 8e09e790ae1788f34d14f1b04a558602563e73c7 SHA-256: 399c9500a934d371ad9c8642e7a30e9ccbc254103ab8a249c459d463e4ccd16d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Cessna 208 maintenance manual' and includes the URL https://ttraff.com/pify?keyword=cessna+208+maintenance+manual, which is flagged as a malicious redirector. This suggests a social engineering attack aiming to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cessna+208+maintenance+manual
    • http://fujadozu.vanessamariedewsbury.com/uploads/1/3/0/8/130874493/4463587.pdf
    • http://files.assiniboiakinettes.com/uploads/1/3/1/8/131856176/bebavolufos-jezuwino-jekuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/gotutiwij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/52964534598.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/pifed.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/bijenoforenukevutuzabuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/christmas_carols_easy_piano.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/33415239529.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/gefikisubofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/64430256713.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/rumble_fish.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_off00005d16.bin
c86721b1d171fef4b66d45b06d1bb725ab66c3a18680ed7d0fd2b5d361b7fd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 5220 bytes
font_01_sfnt_off00006ebc.bin
b9fcad8aee5264ef11edfa26933218ad1bfcb49c72f255d9c6ba7f913999b3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 14788 bytes

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