Malicious PDF — malware analysis report

Static analysis result for SHA-256 683e6fc3dd43e526…

MALICIOUS

PDF

50.4 KB Created: 2020-08-01 00:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344e0f59d015b831252b0800e996c5fb SHA-1: e89bd389abb92ccfadbbf18ecfee60731c5a0fd1 SHA-256: 683e6fc3dd43e526056721cafc5f8ff51ed2028c550b811f6b991c3dfe481d0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'James Patterson net worth' and a URL that aligns with the redirector finding. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=james+patterson+net+worth
    • http://files.thomashossie.ca/uploads/1/3/0/8/130874559/wilezapur.pdf
    • http://files.gallipolisriverrec.com/uploads/1/3/1/1/131164009/10ca4b39aad.pdf
    • http://files.goldencrownrealty.com/uploads/1/3/1/6/131637194/b32ed.pdf
    • http://files.countryminds.com/uploads/1/3/2/6/132695384/tujegedewabejiw_lodasogiko_tigukoxewux.pdf
    • http://files.ultralightpaddling.com/uploads/1/3/2/6/132695566/9704346.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/84268414583.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/86440879406.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/89609218787.pdf
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/46199703766.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/89340977185.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/nixiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/bopobufugodiwisanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90278046640.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/70960905854.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2240/files/6709393236.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a30.bin
ed319a2da81e18efbe0c8d094d4538dbbe236687a84c35f6046baf6d3ae6d4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 4848 bytes
font_01_sfnt_off00008a7c.bin
c3d823d7a1fd08e4f07c49e86d9db871ac2a628f145b98c55788509f08747e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7C 10876 bytes
font_02_sfnt_off0000ae65.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE65 4324 bytes

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