Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e99f2039030015b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 20:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61427609dd30f0e504bb51fb0ace9be5 SHA-1: 9776905021d472ec599de2b80ad424a8e4b10651 SHA-256: 7e99f2039030015b1232c3b5eeb45e4ece833b4855afd6ae555131e9f9ee99e4
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, disguised as a game walkthrough, which is a common social engineering tactic. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a link farm or SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate 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.club/wix?keyword=steins+gate+elite+walkthrough
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/98201830360.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/43799780042.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/nrsv_study_bible.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/vuxizawiwukuwaki.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/48700875314.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/degeboperapasiluk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/46005540643.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/vubasafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/vibudibasegikogubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/lamudenoruvazurot.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/naming_aldehydes_and_ketones_practice_problems.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/74129232371.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/nefovutejixatitesusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/88171712729.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/74111353676.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/nice_guidelines_wound_assessment_tools.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/cylindrical_roller_bearing_skf.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/metemupox.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_off0000609f.bin
130dfd2afa769f7fab9a59e091e0559512a96b1238c55bfc0bf14b9025dad060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609F 5208 bytes
font_01_sfnt_off00007255.bin
5ad3e65dc47dad9f47f7859ed19caf95dc881c755373a72479f2dc2307335b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 9960 bytes

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