Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbba60c5505ec455…

MALICIOUS

PDF

78.8 KB Created: 2020-07-23 12:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67d3141d2d9993f151d181f9ac47e0e1 SHA-1: bbfb1e9d6c4ef61dd501af192bc598e02ffc6732 SHA-256: dbba60c5505ec455e99325cbb86345bac30b00bd287402e6e3dcdc8048472476
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 link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'healthy relationships worksheets pdf' to mask the malicious redirector. The presence of a large number of external PDF links further supports the classification as a link farm, likely used for SEO poisoning or to distribute malicious content.

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.com/pify?keyword=healthy+relationships+worksheets+pdf
    • http://files.ladymaeimpressions.com/uploads/1/3/1/3/131379434/ba398.pdf
    • http://files.kcliu.net/uploads/1/3/1/3/131381542/zevedeti.pdf
    • http://files.creaturesgrimm.com/uploads/1/3/0/7/130775490/gawuzifipotazijel.pdf
    • http://files.timmesserconstruction.com/uploads/1/3/0/8/130813514/393596.pdf
    • http://files.thebotanyscholar.com/uploads/1/3/0/7/130775471/3919608.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/68862498424.pdf
    • https://cdn.shopify.com/s/files/1/0431/8203/1007/files/vejijugupeduboga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/witofazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/82072419959.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2198/files/mobabezumije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/xepetavuxexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/karenarajaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/tinupuxolegimesum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/78735348344.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/73392135251.pdf
    • https://cdn.shopify.com/s/files/1/0436/7505/8329/files/jijulurun.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_off0000f6d4.bin
2180408922adf670992aa36988da736f72ac474683c606458d64b9e278d5d93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D4 5136 bytes
font_01_sfnt_off00010853.bin
9bd6be5249092841c4ad34136465ccb3b35a06f3dc99c6033d51aa1ee3addd87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10853 11028 bytes

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