Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d966fad8eb483c0…

MALICIOUS

PDF

43.7 KB Created: 2020-09-08 13:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a65949e78d31b27d095223ce5a2b206 SHA-1: bbe6fd004067a7cc2d2d2f3d0783fafda788e0bd SHA-256: 1d966fad8eb483c0fb1208e9737de870b91e145d2b639f9b961fcf0e6033dd70
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other PDF links points to a link farm SEO tactic to improve search engine ranking for the 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.me/pify?keyword=solutions+to+poverty+in+the+philippines+pdf
    • https://static.usrfiles.com/ugd/61b8bf_759de6351d094ccead86453c6e910050.pdf
    • https://static.usrfiles.com/ugd/c068f8_9d634aa33f4c46f9a6492360a9da4222.pdf
    • https://static.usrfiles.com/ugd/576447_7f1b83f7d87d44dc9d9e2b4367839295.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/libasazufokadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/71279949757.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/asus_rt-_ac66u.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/speaking_english_learning_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/83882323536.pdf
    • https://static.usrfiles.com/ugd/90d19e_ed5bd72af86c47e2aff50dcd7f49305a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d089fc0ad8e456caa0a9e5e7193cf6c.pdf
    • https://static.usrfiles.com/ugd/db93e9_2c7567515f604567a319c414a89beb96.pdf
    • https://static.usrfiles.com/ugd/296484_c79a35471ce54978852dbfc43d8aa163.pdf
    • https://static.usrfiles.com/ugd/e56fe2_9d212c6c412b41909a43718d22e03ce8.pdf
    • https://static.usrfiles.com/ugd/a421e3_6cb8d6834de54176a8d6c44435676537.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_d6b422730b24487bb03f1a6595ab9680.pdf
    • https://static.usrfiles.com/ugd/3ed44c_8305827d96de467aa222942fb369809f.pdf
    • https://static.usrfiles.com/ugd/76156b_404ed82c00c84d0c9f1d541c7e1a640f.pdf
    • https://static.usrfiles.com/ugd/b8c837_00b3841e60a445598df8d3c5c2635e84.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_off00006beb.bin
c89c436c527ba42e412674b8023f9c4c8988675285f02a205d20f55c417a0ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEB 5184 bytes
font_01_sfnt_off00007d95.bin
a58f9f90df0c200363c6f6a4c1a825443f6efde9f37ba34684ed8fbed3805a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 10824 bytes

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