Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4dfa1760a579be4…

MALICIOUS

PDF

45.7 KB Created: 2020-07-20 21:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1d852346a5d629684ddd4029097a9f0 SHA-1: 46be0b9039c80e8e1a76604da4bee393578ec335 SHA-256: f4dfa1760a579be452886607d5f45f62f9e9436846a8ce81dc8bdab21d6056ef
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'conjugacion del verbo haber pdf', suggesting a lure to disguise the malicious intent. The primary attack vector appears to be tricking the user into clicking the malicious link, leading to a potentially harmful website.

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.com/pify?keyword=conjugacion+del+verbo+haber+pdf
    • http://files.theparlepodcast.com/uploads/1/3/2/3/132303001/sanixavomavikabe.pdf
    • http://files.sophieduffy.com/uploads/1/3/1/3/131398145/2043551.pdf
    • http://files.bergenphotography.net/uploads/1/3/2/6/132682204/1172733.pdf
    • http://files.channelcenter9.com/uploads/1/3/1/0/131070178/vinaforuk.pdf
    • http://files.cottagemusicjunior.com/uploads/1/3/1/0/131070001/15d1ab01c604c.pdf
    • http://files.cottagemusicjunior.com/uploads/1/3/1/0/131070001/15d
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/mefasikomatidunapigow.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/xomifavatalerovenedawep.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/16235068569.pdf
    • https://vixakaduza.files.wordpress.com/2020/07/85486673999.pdf
    • https://fakenigali.files.wordpress.com/2020/06/wakazigekuj.pdf
    • https://jemurubo778627768.files.wordpress.com/2020/07/pojitafox.pdf
    • https://luriwoge.files.wordpress.com/2020/06/satijuzekok.pdf
    • https://valafepow.files.wordpress.com/2020/07/tosavubujaxawatefej.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/45938478517.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/16265322720.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumuwajufutoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/3953834961.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/210599405.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/34772531671.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3935/files/23766290706.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/24296665103.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/3934628844.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.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_off000071fb.bin
babd7147f3dca19b97ed23fc7ff4c2d18bc4dee201f6f2affbae3d659cb9f456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FB 5340 bytes
font_01_sfnt_off00008420.bin
9c184bbce5a5715db3190c9ebb48d60954c9387f7dc99b1aeda2205bdbd6d124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 10916 bytes

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