Malicious PDF — malware analysis report

Static analysis result for SHA-256 a605839f9735a46e…

MALICIOUS

PDF

38.1 KB Created: 2020-08-07 06:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b7465a56eaa56dc1a2668e4dd77cce SHA-1: 6e41fcbd2a5e147ca1623544e56ca92b999bebad SHA-256: a605839f9735a46eb03e2e56781f21dab6ec3523f28a36d2d3f1e99464b293e7
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'Adobe pdf maker' and the malicious URL. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content.

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/pify?keyword=adobe+pdf+maker
    • http://zufekovil.thelashladyutah.com/uploads/1/3/0/9/130969744/tikabafubo.pdf
    • http://files.eijustus.com/uploads/1/3/0/8/130813667/febojotuwisevixine.pdf
    • http://files.thirstforknowledge.ca/uploads/1/3/1/0/131070173/afdff8cc.pdf
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
    • https://cdn.shopify.com/s/files/1/0438/1714/0386/files/discord_chat_rooms.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/wixapibuvagokilubosagud.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8236/files/tratamiento_de_disenteria_amebiana.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/hash_tables_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/gemijewuninakixuwom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/15286085109.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/balance_druid_leveling.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/ornamental_plants_pictures_with_names.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/gibuwawita.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_off00004ae2.bin
2c0db51174bd70ddccc0a3bcac3baf87a8356444919e48beeccd3876aeb844ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE2 4724 bytes
font_01_sfnt_off00005ae4.bin
b3a5d05aaf4ae676f33fa8e0c36f25ebdc0660c3e3cb849ddae08b84c4494fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE4 10156 bytes
font_02_sfnt_off00007d93.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 4324 bytes

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