Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a74ba1fce8f60fa…

MALICIOUS

PDF

45.4 KB Created: 2020-08-24 01:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c23670818c780da7e820dc8e984a74 SHA-1: 7cdebabdc0f6d4b902a6280c9ecb84d6887bcdfc SHA-256: 1a74ba1fce8f60fa91d6ddeab56648b2986e28a9551d57c4f503d89574bcbd64
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment 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 links, many hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=harebell+piano+sheet', is identified as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of a 'download button' heuristic further supports a malicious workflow. No scripts were extracted from this sample.

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.com/pify?keyword=harebell+piano+sheet
    • http://xurepe.higgins-umc.com/uploads/1/3/1/3/131398134/9558572.pdf
    • http://files.yourfitnesschloeshea.com/uploads/1/3/2/8/132814355/0992dec428.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/adventure_time_filler_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8200/6171/files/fejipitejopob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/nijulisozifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/monedowujaraguralawopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/sovokipevokijaliwafezote.pdf
    • https://cdn.shopify.com/s/files/1/0430/5997/0202/files/mowapazezininipuwinoka.pdf
    • https://cdn.shopify.com/s/files/1/0461/3842/5497/files/behavioral_approach_of_performance_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/rojev.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_off000059e0.bin
6fb7fa7183fee7857598ccea6f5b31e0f1371d533bb9c88213bdafe1ef32547b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 4796 bytes
font_01_sfnt_off00006a09.bin
98f126e6cbebdd95859e1b58118e222484bc5cfe320476d9efbfa40d4a4ad949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A09 15204 bytes
font_02_sfnt_off00009935.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9935 4324 bytes

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