Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5f4a5b11be86ef…

MALICIOUS

PDF

43.1 KB Created: 2020-09-20 17:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7d8a085167c0a6ead400c7061a9b70 SHA-1: 2a31421559a0aef5661a4105416d5a42643935c2 SHA-256: cc5f4a5b11be86ef377487a7dff790c801420b2f49bc4006b86d4e6f47c516e6
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, "https://ttraff.link/wix?keyword=dark+money+pdf", is designed to lead users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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.link/wix?keyword=dark+money+pdf
    • http://files.troop-649.org/uploads/1/3/1/8/131871864/718f504b.pdf
    • http://files.sadafamini.ca/uploads/1/3/2/3/132303099/dakidop.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/anonytun_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/avery_business_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0447/8743/3623/files/taxuvage.pdf
    • https://cdn.shopify.com/s/files/1/0449/5081/4888/files/biology_practical_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/guwulegeritepiweg.pdf
    • https://015877ff-fd07-43eb-b27e-ae4794792aba.filesusr.com/ugd/e1c37d_c6951dd4c8e848c6b39f740aeecff15c.pdf?index=true
    • https://27f62e4f-441f-413e-a30f-498c5d41b658.filesusr.com/ugd/49488e_e1fbfd3959e14c8c9ad2c76b33fb33c8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0453/4242/5243/files/96947820923.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/gujarati_to_english_barakhadi_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/battlegear_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0437/4760/6679/files/framework_3._5_sp1_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/14567069472.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_off00006bb7.bin
be9fae3b2294d7847f80a66a822abcedb2ee4d407c097b25a440e28bed803285
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB7 5144 bytes
font_01_sfnt_off00007d38.bin
3dd5906a69dc71403f4181ec5f18de49690a8eb1ded089086c4678fd5c75995e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10236 bytes