Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccb799d717fda55…

MALICIOUS

PDF

40.0 KB Created: 2020-07-23 22:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9b8073c30a622e17ad4369e48d947a2 SHA-1: fb6885e65f98ba81cb8b2c987c4261fb0f507f42 SHA-256: 0ccb799d717fda552067af62f4c75b30ccbb71a7cc987b09245282915fe4fcf1
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to a known malicious redirector. Additionally, a heuristic for a 'download button' lure suggests a deceptive user interaction is intended. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a phishing or redirection attack. No scripts were extracted, but the overall structure and heuristics suggest a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=avenir+font+black
    • http://files.prattindustriesboxesericstorm.com/uploads/1/3/2/3/132302928/1802870.pdf
    • http://files.haidagwaiimagazine.com/uploads/1/3/2/6/132680853/2099364.pdf
    • http://files.artrageousfolk.com/uploads/1/3/0/7/130776790/8441069.pdf
    • http://files.hinotefarms.com/uploads/1/3/1/4/131452804/7fca9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/sonufoxekuderawodir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/4923750353.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/1386452367.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zaxazageb.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/tufog.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/40256512945.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/lamusuwivokuderoguwosado.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/lumiziritugejijos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/sugesirodumewakowulif.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0061/files/3826099097.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/39279106870.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/kebumopilerozinis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061df.bin
4cdf805830c627124db31391ef3bdbed0e4fcf876704786a66463c1e210fdd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 4740 bytes
font_01_sfnt_off00007201.bin
1cffb70046757da640dd06b5bc5311982142c603e070c6e034942941b873248b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 9736 bytes

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