Malicious PDF — malware analysis report

Static analysis result for SHA-256 899c43229a2a7f93…

MALICIOUS

PDF

86.8 KB Created: 2020-08-02 02:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00217971c78c7c14c7242cc2795aecb8 SHA-1: 4903e092e194bee6747191c6c1da43fe70684f55 SHA-256: 899c43229a2a7f93247eeced9c6367f62708a6df28f6b4c3f9eac833188a65c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to game leveling ('Warlock leveling spec 1-110') and embeds a link to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting a spam or phishing campaign. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious 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.ru/pify?keyword=warlock+leveling+spec+1-+110
    • http://files.coronadoswcd.org/uploads/1/3/0/7/130738955/8498539.pdf
    • http://files.thenewportshow.org/uploads/1/3/1/6/131607943/4db7c5210.pdf
    • http://files.dealingwithstuff.com/uploads/1/3/1/8/131856270/ramosik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/kawotagelidiweged.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/pozupimobabagoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/galuloxipuripimufuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0449/4766/9160/files/massey_harris_44.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/netizawisubajesenunewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/xarufapupiraladilixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/sunirenavefowuxosat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/xewulu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7795/7800/files/28218335459.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010079.bin
889646ffd342f471eefd03bfb1ee4864dc5939e86fcbe5c84dbd87431e385235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 5464 bytes
font_01_sfnt_off00011341.bin
436d8a5f9284cf57c39272496d71eddf47f42fc67fb6636c599e085817e0e2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11341 10652 bytes
font_02_sfnt_off000137e0.bin
b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137E0 16312 bytes

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