Malicious PDF — malware analysis report

Static analysis result for SHA-256 53918fb58d6f911a…

MALICIOUS

PDF

48.7 KB Created: 2020-08-22 01:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59e1cbd3da31a1110e601812597ea740 SHA-1: a6abd8c4bf60c3b2692bdbae97e0b56a0ac1982a SHA-256: 53918fb58d6f911acfec4b3c31256102cefc9279921e0a1340903a30a7d47109
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is presented to the user as a download for 'Bubble shooter 2 for pc free'. This indicates a social engineering lure. The PDF also contains a link farm heuristic, with numerous links to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content widely. The embedded URL in the document body confirms the presence of the malicious link.

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=bubble+shooter+2+for+pc+free
    • http://jepakewu.perthimage.com/uploads/1/3/1/8/131871721/5f8cf6e5.pdf
    • http://files.covidsa.com/uploads/1/3/1/3/131380083/3424723.pdf
    • http://bevokob.coachchoo.com/uploads/1/3/0/9/130968961/numigobedalulov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/14290224426.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/literacy_strategies_for_improving_mathematics_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0435/9018/9215/files/netumotuwasumamek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/96172756523.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/tifutipipumiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1996/files/25929629531.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/negesi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9071/files/tasozubigapovagepojomavor.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/cadette_babysitting_badge.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9989/files/80574742935.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/history_of_ancient_greek_literature.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/95503882488.pdf
    • https://cdn.shopify.com/s/files/1/0428/0378/9991/files/30789770067.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/bolidirug.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/mamas_family_full_episode.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_off00007f1e.bin
2c63759fc4667a73cfa23a2cb9df277403d1113109bfb0a88aec726c58855e84
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1E 5212 bytes
font_01_sfnt_off000090d2.bin
ae3af0723179474114e935c0dc55d1623190b71be73ccd36f823d1956baf1699
pdf-font-stream PDF embedded font (sfnt) at offset 0x90D2 10656 bytes