Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fc764bdb7e8fd6…

MALICIOUS

PDF

113.9 KB Created: 2020-09-09 00:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54a86f522a19dcabeb85634aec89a72d SHA-1: 548f17b18f9410b9adb12d6282b6b95cd0b66174 SHA-256: 06fc764bdb7e8fd605fe9d6f963fdca0efcf22d08daad0f768c7b44454aade58
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure related to a game upgrade guide, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=cabal+divine+upgrade+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0047a4_3d0c2c72122e476d9724dac69dbb2b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_88b9ef4220b64299b85ebb8981df6e3a.pdf
    • https://static.usrfiles.com/ugd/0f9ef0_8f264ce2e1f84a9fa1e0334ff5393db1.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/69236642060.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/ajay_atul_mazi_gani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/classroom_management_book_wong.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/jasada.pdf
    • https://cdn.shopify.com/s/files/1/0463/1802/6917/files/63905951005.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/66646727545.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_15848ecadcd4466694c071a5bf3a77e6.pdf
    • https://static.usrfiles.com/ugd/3b0c81_9fa96593ccf6412baa119ac39edd46f5.pdf
    • https://static.usrfiles.com/ugd/06497e_6c9c449b78c54936a84df26a1dead090.pdf
    • https://static.usrfiles.com/ugd/e6092c_07fefb1ce01a4a0fb3a038a0f83e62e0.pdf
    • https://static.usrfiles.com/ugd/e3ff21_d98ae9ce05de425bb57a73b8eaff5bb4.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001582f.bin
048838d164d6748e88081a9aa5d40f0ae5f807c8a556fdb355d3530e3730c135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1582F 3552 bytes
font_01_sfnt_off000164fc.bin
614a7bdc84281a32271eb9178e6f60038759f9da0882fed151353597811827e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164FC 5052 bytes
font_02_sfnt_off00017638.bin
4fa69b793277e74b1f603cc2abc82d219b90fa5310139ae73e918ecf845471ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17638 15200 bytes
font_03_sfnt_off0001a521.bin
bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A521 16060 bytes

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