Malicious PDF — malware analysis report

Static analysis result for SHA-256 5765d4c65bea6e7b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 09:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d009a6d45b4613451ef844c055f4264f SHA-1: 68385f281dc400f9f67703409ebc3ab75f4c759f SHA-256: 5765d4c65bea6e7bc7916f0edce0d9e75832bf03ac4cb105d8d257b4eee5ac31
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, which in turn leads to a large collection of other PDF files hosted on Shopify. This suggests a link farm or redirector strategy to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=streets+of+rage+2+cheats
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/38563141940.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/35263629630.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/bevipubidejukidiwuri.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/rupuxidobusodewimoje.pdf
    • https://cdn.shopify.com/s/files/1/0446/9984/4762/files/history_of_kashmir_in_urdu_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b3c28caa47b4b82a743482ddadeec86.pdf
    • https://static.usrfiles.com/ugd/b8c837_59962bd600ad464d9eb0dc9e5e75b475.pdf
    • https://static.usrfiles.com/ugd/b8c837_c079e397d6b543469c9d93c04b4a128c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a82ae17b5144f42893c9c807b15cc34.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b723ca448249d7b193bc810be51e90.pdf
    • https://cdn.shopify.com/s/files/1/0461/9721/1294/files/kidzee_franchise_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/windows_10_activation_toolkit_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/74918190586.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9116/files/binary_options_candlestick_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/county_line_surf_report.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e49f77761e24b63bba8c6a058ac9724.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d6f124867a9477ca7ee8bef31057f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_066661f93d3b4f26b920ce26d2e11df3.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_off00005dc1.bin
8c076eaa820d4c0a1008704e32d0ee59c5e863a8227e463872d281e2080dbc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 4980 bytes
font_01_sfnt_off00006eb6.bin
e669d9b9542fdd11451a4c24b5b8a0ea422adf29e23cb165ba006d515ffd96da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB6 10196 bytes
font_02_sfnt_off0000919e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x919E 4324 bytes

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