Malicious PDF — malware analysis report

Static analysis result for SHA-256 a894495ce0715ad3…

MALICIOUS

PDF

115.4 KB Created: 2020-07-30 09:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8575b15618cd40f793e824483f4a8222 SHA-1: cc3c1e36fd42db25038d30666a98dd1084f76afb SHA-256: a894495ce0715ad3ca347ad084a8ed898d0fcd2c45b2d539bd06325f13ddfad1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a search query for academic material to disguise the malicious intent. While the document body contains garbled text, the presence of the redirector link and the link farm heuristic strongly suggest a phishing or redirection attack.

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=revised+inc+bsc+nursing+syllabus+pdf
    • http://files.bellaluceskin.com/uploads/1/3/1/4/131406749/jopubogadese.pdf
    • http://files.leannegerich.com/uploads/1/3/1/3/131379456/mewivuxorimegeruzu.pdf
    • http://files.broadwaysphotostudio.com/uploads/1/3/2/6/132681450/somanotek.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/7278923939.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/bojijatanujadex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/84927546732.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/rexetagotukegitozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/sogasowuzovenububam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8198/1347/files/61950417595.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/xukubuziziruge.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/bizasezifolisipafibosoku.pdf
    • https://cdn.shopify.com/s/files/1/0435/0266/5892/files/64636695806.pdf
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/saramewom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/43353528906.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_off00018232.bin
d9ed393f6272a82d81176c85b97bc6f852e9deb4345d926d41bf02336718feda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18232 5324 bytes
font_01_sfnt_off0001945b.bin
ad0fba92c4dab38869c8d75cbd328d202bd30d189e6f773f3a933a0e20e3f9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1945B 13976 bytes

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