Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdc8b45e779c683…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 15:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f2d32732cc73a54b9ae72f7b3f92f22 SHA-1: 556c5e53180c4741b865f38e49837b8d6496cf8e SHA-256: 3fdc8b45e779c683d5521599aefa3ef7045271dc7115eb2fb4bba46878097d06
150 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, pointing to ttraff.ru. This URL is associated with a lure for 'carnivores dinosaur hunter reborn android'. The document also contains a large number of embedded PDF links, many of which point to Shopify domains, suggesting an attempt to obscure the malicious redirector or engage in SEO poisoning. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.ru/wix?keyword=carnivores+dinosaur+hunter+reborn+android
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/40558906877.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/pdf_to_word_arabic_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/cluster_computing_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5738/files/cessna_172s_poh.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_5191f11856904d63a3ae1d6e86a80169.pdf
    • https://static.usrfiles.com/ugd/0e2875_aa8de1ee1ddb407fa7cf187253f7603c.pdf
    • https://static.usrfiles.com/ugd/299074_f53075900d4349c99432c63e45234860.pdf
    • https://static.usrfiles.com/ugd/eaf48f_b2d6f0940df94346a413db37dea4b6c7.pdf
    • https://static.usrfiles.com/ugd/432b07_f04c85f7b3d74e9f96ab65452a435762.pdf
    • https://static.usrfiles.com/ugd/895bef_9ebf42e3418a47588aab1d2c7f6b4b15.pdf
    • https://static.usrfiles.com/ugd/374ce0_2cfce552e6bf49f4af6fac3093901fb0.pdf
    • https://static.usrfiles.com/ugd/934fc3_296f862307794332af6570d6ca296bcf.pdf
    • https://static.usrfiles.com/ugd/79e5df_0f5b4ad664014de88b69a9b7c6bae183.pdf
    • https://static.usrfiles.com/ugd/ae15ca_f803269edb764d3e8e1de773cf550c58.pdf
    • https://static.usrfiles.com/ugd/b8c837_b24f09a0afc94eb8a3a36743a3374409.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b8f1a4400a3422b8909dc1a4f0ee5ce.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065bc.bin
48d623306035b08b7a65f323d1a8c7378cefb51dbc603bce6bf80ca489d61aa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 4988 bytes
font_01_sfnt_off000076a6.bin
ec8bb62f00e97e5327051533fbd8f96a70d03f62ebc9f27ca16261937565eb64
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A6 9956 bytes
font_02_sfnt_off000098b7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B7 4324 bytes