Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b2926f947414b3…

MALICIOUS

PDF

41.8 KB Created: 2020-08-17 02:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c158b41edc8ab2725a1f67983c55c434 SHA-1: d3fed1e4bd373b079171744a0617074699d0114b SHA-256: e9b2926f947414b3530733adad7a821c34efa8b6195a847300bd2d39fb9df341
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=3d+dog+anatomy+apk+free, is designed to redirect users to potentially harmful content. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to obscure the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=3d+dog+anatomy+apk+free
    • http://files.melaniedaylelauren.com/uploads/1/3/1/3/131382630/a6d885e.pdf
    • http://files.isabellegiroux.net/uploads/1/3/1/8/131856333/3843205.pdf
    • http://files.morjimcocopalms.com/uploads/1/3/1/3/131384789/2a0aea98a146c0c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/2000_chevy_blazer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/install_metasploit_kali.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/98519545316.pdf
    • https://cdn.shopify.com/s/files/1/0436/4114/3454/files/congruence_and_similarity_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6783/files/bajaj_allianz_bike_policy.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/16302690463.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/62658432257.pdf
    • https://cdn.shopify.com/s/files/1/0438/3509/7245/files/suits_episode_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/36781572948.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/computer_architecture_and_organization_download.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ff.bin
3136bd705179b7b524518c34a2bf3ad8905952ed488fed46c897c3c991964c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 3212 bytes
font_01_sfnt_off00006580.bin
62f6ddd36bd39c93b0ebf4cd44ef0bd21f39d208b944df956037a56dca677144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5384 bytes
font_02_sfnt_off000077cc.bin
353ab6b5d78bae32a338ee44c8542118bb908fdf9115f10d5f4a6acfdee6379d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CC 10152 bytes

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