Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe21e732f34b30d1…

MALICIOUS

PDF

45.5 KB Created: 2020-09-20 08:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7fefc9adf21210f41e5fa87638ac5df SHA-1: a5b4b05cfe2f2632b5c84ac0396e977095aa3f56 SHA-256: fe21e732f34b30d16dc854baa8fc21befae6c88dbf9d3c0baf64da590a5076d4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=consecuencias+del+pecado+de+salomon'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are to potentially malicious or SEO-spam domains. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and heuristics suggest a phishing or redirection attack.

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.me/wix?keyword=consecuencias+del+pecado+de+salomon
    • http://files.bobodigitalmarketing.com/uploads/1/3/0/9/130969461/4415997.pdf
    • http://kibigut.2018eradreview.com/uploads/1/3/0/7/130776225/480da12366399a4.pdf
    • http://liwibuka.mystiquesportfishing.com/uploads/1/3/0/8/130814328/sularirowusuk_nadevejigur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/67547556096.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/fogoxevikam.pdf
    • https://ad659f8d-5929-4141-886e-499dc6cad079.filesusr.com/ugd/ddb60a_d50569e1dc9444978fa4d622a3955e7a.pdf?index=true
    • https://1b484e1d-600b-4d66-afc8-0dbfe0481629.filesusr.com/ugd/5f4192_52049898bd134357bf50d9319827602e.pdf?index=true
    • https://6365e342-235f-4d6f-8f9f-d9a5b6ef23fd.filesusr.com/ugd/d17951_ddd7ceb28af74bdcbbc6939f001a56e8.pdf?index=true
    • https://93e1ced8-c86e-4d0d-838d-eecb046de9db.filesusr.com/ugd/9757e7_b4450c3ea7b049a2a71c876f96c4e63e.pdf?index=true
    • https://7b2fd917-f71b-4fa1-a79a-faba1770099f.filesusr.com/ugd/05900a_4b0dec9f1bfc44a5b3a9bafa807a6706.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/zewunuxinimurefololabitar.pdf
    • https://cdn.shopify.com/s/files/1/0477/6293/1868/files/mimutakoguwasidozefawut.pdf
    • https://cdn.shopify.com/s/files/1/0485/2704/8859/files/red_cat_bus_route_perth.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/85447991163.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/xowofu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fa2.bin
cd6cc3f8dadbd89532dc8b78d2d75922a8d4b5e50548a1cdb737c2eeb015c52d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA2 5028 bytes
font_01_sfnt_off000080a9.bin
6e6e33c2d8e44452e791b0f8513aa63112b3448a5642b33237b10f72df6d76e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A9 12252 bytes

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