Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff16210167413a0…

MALICIOUS

PDF

44.4 KB Created: 2020-07-25 19:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6cf2e454afdbd74095368227836e1d9 SHA-1: ca7ad87b9f4e8936736e373afc21ab3be5d2688d SHA-256: bff16210167413a0a49ac50131996c9289da75f55a88d96a551f4ec46a7dfc28
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a 'Mitel phone manual', suggesting a lure for a phishing or malware distribution campaign. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning to drive traffic to malicious sites.

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.ru/wb?keyword=mitel%20phone%20manual%205330e
    • http://files.marquisjewelers.com/uploads/1/3/0/7/130739247/duxibijobizi_zenatuxanawov.pdf
    • http://files.food.varistor.ch/uploads/1/3/1/6/131606231/jadomif_xuxipo.pdf
    • http://files.theirmodernlove.com/uploads/1/3/1/4/131407144/fifufesul_xafolepexiregig_tovutisupadu.pdf
    • http://files.theirmodernlove.com/uploads/1/3/1/4/131407144/fifufesul_xafolepexiregig_to
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/27780328439.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/sanewalibegemopimikebud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/40318999231.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/12470550979.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/65882517491.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/sobijug.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/gepolukuzilubozivor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/89909610021.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/gexabixalewumebep.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/1452077209.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_off0000614e.bin
adb697a737ad4cb404f0e5c5a39b1ff5347cd19ce179d5db167a668d499b1b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 3936 bytes
font_01_sfnt_off00007019.bin
11510b2daef9c02ee29ab5455d77e8f952a0b767c4e4395eee60859ab14708a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7019 5100 bytes
font_02_sfnt_off00008146.bin
c0c70c9dcdbd6e75bdb862a778603288ac1f63d6bfb462c4aba39fd2bd4a8719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 10560 bytes

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