Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dd4d9b54eef708…

MALICIOUS

PDF

54.9 KB Created: 2020-08-29 05:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddf6a9a5c85e20b7b9bce6924cb3d64d SHA-1: 106a325054f3a4844693061dff8db6b5a794bd88 SHA-256: 34dd4d9b54eef708756b50cd3c71cbb01aa5ec0a86b4234d7ed095ce7d42df08
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, likely used to host further malicious content. The document body contains the redirector URL and a benign-looking PDF filename, suggesting a lure to entice users to click on the malicious links.

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=guide+combat+de+mascotte
    • https://cdn.shopify.com/s/files/1/0437/7978/4861/files/adb_devices_unauthorized_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/46415155828.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/meguxuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/megigomeponunakikesu.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6301040256f494fbeeebfdcdac7cf4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fbaa83ccf6542bd8792aaad004e0829.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b3849618e7f4a28bd5aa3ced0752dcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_30b6c77c5985416189ec0d6c698dc965.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d4996c4c49c4289a8913bc5ffcd4555.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/razutawetisa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/chess_for_windows_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/14557533888.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/jetakuveneresogurezodup.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/1208118635.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/a_guide_for_the_married_man_1967_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/simevitofire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/basic_english_grammar_for_child.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_off000098f7.bin
03483c36ae82153aca0fc54abbeafeee8219b5ec971e0f0bb89ce22e892470cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F7 5128 bytes
font_01_sfnt_off0000aa4b.bin
0698ceccbc52a1d888134e3109ec797b8f7b201664b445f187d7a49e388fc37b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4B 10732 bytes

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