Malicious PDF — malware analysis report

Static analysis result for SHA-256 52521b5b8cb0516f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 01:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b5a1859e36edc31d14fcd4a2e83cbf SHA-1: fc7e317015a36a7585cfba2fb783658b4f8d0f5b SHA-256: 52521b5b8cb0516f7c0068a47088cbefc34b028a306cc553eac60113d8571178
128 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding a significant number of external links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=celebrated+chop+waltz+pdf'. The presence of numerous links, including one pointing to a known malicious redirector, strongly suggests an attempt to lure users to malicious sites. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of specific user-facing lures.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=celebrated+chop+waltz+pdf
    • http://bebela.totnessvintage.com/uploads/1/3/1/4/131407089/6388323.pdf
    • http://files.hoperod.com/uploads/1/3/1/4/131453907/daxunagiz.pdf
    • http://sapefo.jarrellfootball.com/uploads/1/3/1/3/131379179/vumapesixetonuk.pdf
    • http://files.procleanrexburg.com/uploads/1/3/2/3/132302718/sopuzedokosoboxiba.pdf
    • http://files.sylvanherskowitz.com/uploads/1/3/1/4/131407080/vufapiposar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/xugopekatafixolanos.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/wafabopeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/auxiliares_del_comercio.pdf
    • https://cdn.shopify.com/s/files/1/0431/0987/5873/files/xazizazakiwobowezaxadata.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/kosadedubajekifagupof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/25062536057.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/knowing_the_living_god.pdf
    • https://cdn.shopify.com/s/files/1/0450/0937/1286/files/gcse_chemistry_structure_and_bonding_questions.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/tosug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/bascule_rsh_maitre_esclave.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/tisomefiwagefoketit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/19737126639.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_off000064dd.bin
d1ba2fb66e7d3d79a54efdd409b7cff50e9a64c6ad1f5ee9472f758ca1bb3dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 5504 bytes
font_01_sfnt_off00007831.bin
68f447d2bfe707e0c6cf51f715dfc7a1e9e935b155f44308fe2d164d9848ab33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7831 5252 bytes
font_02_sfnt_off00008a19.bin
2f1f6b9fe5d69ac592bd173ce2cae700df317446608753e9026b0fc6550861b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 10076 bytes

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