Malicious PDF — malware analysis report

Static analysis result for SHA-256 377fc4f32268ff03…

MALICIOUS

PDF

61.5 KB Created: 2020-08-10 13:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e8c8587a5db131214eeb4ee1171ef46 SHA-1: 6f2744833b05bb713fe90eae46aa8f2ff3152222 SHA-256: 377fc4f32268ff0364167c1bb470b8ece4bcc0c990609f51c666d7c93a288b34
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=mobile+accessories+names+list+pdf'. The document body, though heavily obfuscated, contains this URL and text suggesting a lure related to 'mobile accessories names list pdf'. The presence of a link farm heuristic further indicates a malicious intent to redirect users. The primary IOC is the malicious redirector URL.

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=mobile+accessories+names+list+pdf
    • http://files.vixenrun.com/uploads/1/3/0/8/130874264/zomavanirididojuke.pdf
    • http://files.liverpooldesignagency.com/uploads/1/3/2/3/132303163/nidok-vijofimegisex.pdf
    • http://files.careforcommunication.com/uploads/1/3/1/3/131398242/4435120.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/35819560404.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/vubitibebuvejobir.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/livros_sobre_alimentao_saudavel_educao_infantil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/31870611942.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/kevazuzobaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/molomifemejunewuge.pdf
    • https://cdn.shopify.com/s/files/1/0437/8011/2545/files/fupuligulegegutofejijovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/31441231631.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6262/files/factorio_color_command.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_off0000a486.bin
93527a4b5be1b476ea4e87e3d2479d26a32f57744b18a7ba37e787fc362e03ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA486 5236 bytes
font_01_sfnt_off0000b627.bin
6e4ae0ea0de53032ccc8d3c3697bcc39fca802c4cecb339940e005d6082b1453		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB627 10624 bytes
font_02_sfnt_off0000da8f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8F 4324 bytes

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