Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b4cc05f8f854db…

MALICIOUS

PDF

54.3 KB Created: 2020-08-24 13:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b62d08e96821171f6dfcdbf308880c SHA-1: 5ebf73b291454a681d0cc43ef162b7318b0fba2b SHA-256: e6b4cc05f8f854dbffc4cd6f1002d6fc0f6e0cbd28597f6dfe9372fbec6e045a
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=chinese+pinyin+ime+for+android`. Another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content. The document body contains garbled text but also includes the malicious URL and references to wkhtmltopdf, indicating it was likely generated programmatically to host these links.

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.ru/pify?keyword=chinese+pinyin+ime+for+android
    • http://files.grandstrandsaltwateranglers.com/uploads/1/3/0/7/130775515/fiwunegugafevuvaba.pdf
    • http://ruzupiguf.rustonpartygalaxy.com/uploads/1/3/1/4/131453060/6333989.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/dogixikoladomutimomaken.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/59945652894.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/anaplasma_dog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/69321800148.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/vijamerajoxegupuxasafegen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/96782420293.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/19200996256.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5209/files/lupufibos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5870/files/31356608800.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/wenofovasezanesokogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/nipaxusapebozovibomula.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_off000063db.bin
9bf1aff548c2fd21db634cf1d98ebe906fd7533573075fecf15e21392657298d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DB 15816 bytes
font_01_sfnt_off000095eb.bin
a44fad3afd67c9ca7d061a52731abe2ddd764910c6898364cbc499ffaf4a2437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95EB 5256 bytes
font_02_sfnt_off0000a797.bin
7189698cd54dbb250ad439ea00b381b13d3173e37d7f128f2ffabe849e363e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA797 11180 bytes

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