Malicious PDF — malware analysis report

Static analysis result for SHA-256 658bc761fbaca80d…

MALICIOUS

PDF

53.6 KB Created: 2020-08-13 21:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee319a23d9d16479b954e2e37f4327a8 SHA-1: 8e4b39f78985e765ab294e8cd01dfc165db6ce42 SHA-256: 658bc761fbaca80d77a6b422cec8109d460ff510e1293823ec8658de4ec68a10
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of the same malicious infrastructure. The presence of numerous external links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the heuristic firings strongly indicate malicious intent via link manipulation.

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.cc/pify?keyword=mission+mangal+songs+free
    • http://files.beautybeathairstore.com/uploads/1/3/1/4/131452735/fd0f1da0.pdf
    • http://zutiri.nanoteacher.org/uploads/1/3/1/8/131872149/fae5cf8e9.pdf
    • http://files.artlaws.com/uploads/1/3/1/3/131383297/1d43401383668.pdf
    • http://files.samwheelockmusic.com/uploads/1/3/2/6/132681409/5434528.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/wolofalisugufezibuwaxafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5700/4192/files/bagipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tinoled.pdf
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/lu_file_khng_chnh_sa_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/7262745045.pdf
    • https://cdn.shopify.com/s/files/1/0436/6509/6857/files/66373926855.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/36519442441.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/68776833402.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/52129971002.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/18699937256.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_off000079bd.bin
2fb6f1e49bf5d9456f1a85f1a8ebba2630fe8735ceee0ac717437ad057ee06bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BD 5092 bytes
font_01_sfnt_off00008af7.bin
daae190b5176d97dcc4d2e612725f249600bc0d20f22f7331935156a033626ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF7 11564 bytes
font_02_sfnt_off0000b293.bin
e12d31d8609d0f05bcb507b6e055698e367fad7df9c8cf2e12f5487728e008de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB293 16700 bytes

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