Malicious PDF — malware analysis report

Static analysis result for SHA-256 0deb26294ea39914…

MALICIOUS

PDF

50.6 KB Created: 2020-07-28 13:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b806318d5ea5baee4b8c83a039915e SHA-1: 45ef1fa540af8f45b2ab5a918c6c4457c7851694 SHA-256: 0deb26294ea399144701df7fcb6c42f0b9ce3e4974736a3bf6d4251070a6f504
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, suggests a lure related to 'cartoon movies apk', likely to entice clicks on the embedded links. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links points to a link-farming or redirection scheme.

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.com/pify?keyword=cartoon+movies+apk
    • http://files.brokenrailranch.com/uploads/1/3/1/1/131164364/funenifefezup.pdf
    • http://files.qianay.com/uploads/1/3/0/9/130969200/9787538.pdf
    • http://files.yardsoffunwny.com/uploads/1/3/0/7/130739864/3240538.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/fewoduzuduxudakokom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/lalemewawexer.pdf
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/xozateresowuvuxela.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/vewomapugirujoxuvan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/59632679959.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/92481054134.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/silizunumev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/74666046991.pdf
    • https://cdn.shopify.com/s/files/1/0438/4171/6389/files/22848143186.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mukevomisuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/lubipatijorote.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/rufogepegufujad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/vivozetedevutog.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_off000071d8.bin
18213dd39a2a68bfba88564233888333fa8dcb48dae9be95ff314b2fae6230b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 4868 bytes
font_01_sfnt_off0000824e.bin
3d3e5f6b17a9b3350949013e89ae14682a38c57b4df335616d2e38f1fd2a1d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824E 10328 bytes
font_02_sfnt_off0000a5da.bin
59da8db28887b5a8a8f3e3ab5912af6a08eabfaf5e9090ee15cadcffd7f600bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DA 16628 bytes

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