Malicious PDF — malware analysis report

Static analysis result for SHA-256 9153ad8dc69c0e74…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 17:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 312131db7ec8c8136cf82d06c3af9ac3 SHA-1: 8c6ad156635a3885f121dbb8874dbba6851df835 SHA-256: 9153ad8dc69c0e74b9fd4ddc2e157cadde0539e5d5f14daeb785f5cacaae8c12
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute or obscure malicious links. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the attack pattern.

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/wix?keyword=protein+power+book+pdf
    • https://static.usrfiles.com/ugd/105a8c_75c0f4c487444f1fbb9f8e1c7c71f820.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17292eb6db1468bb6f5aa040c921649.pdf
    • https://static.usrfiles.com/ugd/b8c837_1353e6e07bad48c5b2d358914f14a1f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f37fc9c1784e3aadce6cbab6f40feb.pdf
    • https://static.usrfiles.com/ugd/9d869b_d1388a4b19de4cd8ba984da293aa6c92.pdf
    • https://static.usrfiles.com/ugd/97634b_a37adcb2e92c443692745e32787641ee.pdf
    • https://static.usrfiles.com/ugd/3eed2b_b58fafa92c0c4f799e839f37fb23b0eb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/broken_angel_helena.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/vomigedijolukizifi.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_1ca90e50b2c340ec81db44b447d4aecd.pdf
    • https://static.usrfiles.com/ugd/3fc21f_fb580413c14c4df2bfee56110c955dbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed6b4b5cd7af4c21a6159f72421b3196.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_98d8c9b5eb494c009e2df31f66654972.pdf
    • https://static.usrfiles.com/ugd/c068f8_d7b3daaa46ac499aa6c08e1c206a382f.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_off000068c1.bin
30e5735bed5744a51ba315ce5290a4bc9c7ddd7be0c12db0bd4d5f672293f338
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 4912 bytes
font_01_sfnt_off00007992.bin
4e4990096d41eaba759fca83fbaddacf0e4f9dfb673249c5c37a67ad5db4bdea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 10272 bytes