Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85d23df3efb39cd…

MALICIOUS

PDF

64.2 KB Created: 2020-08-20 07:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0429521b744f8f479c3d556fdff9b40 SHA-1: 18678a2f0a9376ce97026cef34117790cc07d69c SHA-256: f85d23df3efb39cd6d1e7fb8642c4a83f1ac8204fb7aa1d39fbfd8b30d220d68
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `ttraff.cc`. The document body, though heavily obfuscated, contains text related to author guidelines and the malicious URL. The presence of a link farm heuristic suggests this PDF is part of a larger SEO poisoning effort to distribute malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=developmental+medicine+and+child+neurology+author+guidelines
    • http://fubevi.cullensailworks.com/uploads/1/3/1/0/131071164/wokasirajoberef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/48475406174.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/cn_banwell_fundamentals_of_molecular_spectroscopy_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/aasld_guidelines_hepatitis_b_and_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/fevafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/11876989757.pdf
    • https://cdn.shopify.com/s/files/1/0428/3177/3852/files/72574901702.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/25941390215.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bududatifaxujefavogeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/21671569229.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/67571867191.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/runescape_construction_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/wofesuwarexanidinolet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/6518247704.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_off0000ba9b.bin
c657b8093d59906d9d364a283fd68ced7c8bb92d307dfef0ab39e439ccc9f7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9B 5648 bytes
font_01_sfnt_off0000cdab.bin
f6fa8d6a0885a86a7591172426252f34169417c91dfe8baf373d3dbf2ba009dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAB 11020 bytes

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