Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a8bd2efc8575c4…

MALICIOUS

PDF

49.3 KB Created: 2020-08-30 05:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd8dc4362c88d17a728d16d01c34e1c8 SHA-1: 62e177404551b345abdfe43f29db42dff396930e SHA-256: 46a8bd2efc8575c49d65d2881d26ea7bfd98f2b6cecf83144decb674458f3897
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service, 'ttraff.cc', which likely serves as a lure to obscure the ultimate malicious destination. Another heuristic indicates a PDF link farm, suggesting a broad distribution attempt. The document body contains garbled text and a URL that mirrors the malicious redirector, reinforcing the phishing or redirection intent.

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.cc/wix?keyword=legend+of+zelda+link%2527s+awakening+str
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/futujamujigawo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/tijaxeken.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/1st_grade_worksheets_free_printables.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/free_acls_review.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc31f4d6b524514a431ef7b2747371e.pdf
    • https://static.usrfiles.com/ugd/405339_1c7e7a3dfc9b49a49b3df1f587950401.pdf
    • https://static.usrfiles.com/ugd/aef5b7_0248e89b1c9e42a187ff8ac0ca6ba232.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_666c3220420144abb6a766e4ec5dfcf8.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/tenozakotokifebeto.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/22707180998.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d08ac3d725a4921b691155fbd84b27f.pdf
    • https://static.usrfiles.com/ugd/837d34_40d50be71140437f9e5ba7ce790fc2e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_59da4d82b3f7489ba22734dd22dd03bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8c4c6b8ac9e40a89c928cd2f02856af.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_off00008348.bin
f40f2e43e8237fa3d407705b5768faf17b5a871c7c83cac5c396aee34ca2cd67
pdf-font-stream PDF embedded font (sfnt) at offset 0x8348 5256 bytes
font_01_sfnt_off00009564.bin
b30c0266e922a0eb3bd344e02a7b14a69bdd489b88cfe8f12252008c02e07a78
pdf-font-stream PDF embedded font (sfnt) at offset 0x9564 10200 bytes