Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e152c208161956…

MALICIOUS

PDF

51.5 KB Created: 2020-07-27 23:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3140202bcb5670e0d474bb7d848100ea SHA-1: cf4bcb9da4de12d5c65510612a5b0410fbf5a9fe SHA-256: a2e152c2081619568f9a14be4089c683da6b967e7b596a35fbb935514192bb14
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is likely used to funnel victims to further malicious sites. The document body itself is largely unreadable, but the presence of the redirector and the ML classification strongly suggest a malicious intent, likely for phishing or malware delivery.

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.ru/pify?keyword=1%252F+100+gundam+barbatos+6th+form
    • http://files.yogabybarb.com/uploads/1/3/0/7/130776739/3622985.pdf
    • http://files.westwoodunidos.com/uploads/1/3/1/6/131606923/wisudota.pdf
    • http://files.centervilletxedc.com/uploads/1/3/1/8/131856574/bifewulipononi.pdf
    • http://files.bulkbathandbodyproducts.com/uploads/1/3/1/4/131437223/1530165.pdf
    • http://files.bulkbathandbodyproducts.com/uploads/1/3/1/4/131437223/1530
    • https://cdn.shopify.com/s/files/1/0428/6896/5532/files/39052345996.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/2116998854.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/25016806939.pdf
    • https://cdn.shopify.com/s/files/1/0440/5339/7654/files/95350404245.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/3825506721.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/kizanunaziguwaseku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/firatipu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/vorajavif.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/bekakigix.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/rotonixewasaxeju.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/pamufoge.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
stream_006_off000072a7.bin
0e594df2b2845dbc78a1d530596a904462b649366dfcff0a1b37b78a35ca4926		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x72A7 12236 bytes
font_00_sfnt_off00006075.bin
451b30081ecb26ee2b64eac0966a2a8d03d49605a7ed5f0b04e40ec3f00f1b8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 5432 bytes
font_02_sfnt_off000094ba.bin
2bf99a5e03344b4834dedd6d88d0c5df621ff38b7d09834d524de2ebcf7186b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94BA 13984 bytes

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