Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd4e9790d0a14d2…

MALICIOUS

PDF

45.9 KB Created: 2020-08-19 09:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feb5a548548fef303ea19b60480dc7b9 SHA-1: 5adf5684221d46633db79ff3f1effa1b9aae9d9a SHA-256: 1cd4e9790d0a14d2357beb6a3d76707e93f1481dfff5ff8cd0001b7aae61b042
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also contains a large number of external links, many hosted on Shopify, indicating a link farm for SEO poisoning or distribution. The primary malicious URL is used to redirect the user to a second-stage payload.

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=shao+kahn+combo+guide+mk11
    • http://files.gittesatre.com/uploads/1/3/1/8/131857114/tamid-tufepupagu-lezanilisipo.pdf
    • http://files.yogacreations.com/uploads/1/3/0/9/130968933/murekekubo_rogem_sixofipol.pdf
    • http://files.drakebaynature.com/uploads/1/3/2/7/132740384/petulereginesibi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/92802658682.pdf
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/310080053.pdf
    • https://cdn.shopify.com/s/files/1/0436/9268/7513/files/super_smash_bros_melee_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/refuwexif.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/brilliant_legacy_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/guteguzofuxubelirijigoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/clinical_infectious_disease_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/puxedebomusateferi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/vafezo.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7c.bin
8db5477a0e3130c73c7f1aefe72d321f970c7d1a88f7380e500335698c61362b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 5404 bytes
font_01_sfnt_off00007cb2.bin
d97eb72f256c310cb9943966e847a6d4d71bc7185cdce7ea4ed33c3e8feebc81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB2 14904 bytes

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