Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80cfb5c835cae9b…

MALICIOUS

PDF

45.6 KB Created: 2020-08-02 04:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56bd8365b567569c4cbeb20decda5e9b SHA-1: f30e322560719e8292af5a522b17573a849622a3 SHA-256: f80cfb5c835cae9bc8e0fcd1116109d4a80eca3003052e5de66fafcbe0f5e6dc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body text, though partially corrupted, suggests a lure related to an 'Intex saltwater system manual'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further 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.cc/pify?keyword=intex+saltwater+system+manual+pdf
    • http://files.sylviasweettreats.com/uploads/1/3/0/7/130739069/reloloxanizafo.pdf
    • http://files.bishopsstortfordjudo.com/uploads/1/3/2/7/132740482/911cc0d3a1.pdf
    • http://files.gbcmtx.org/uploads/1/3/1/6/131606392/2326639.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/viliworadoveruwopovubur.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/8178930436.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/11982087400.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/94886840114.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/wegapojinazeje.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/5505402887.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/vipinigajejit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/fifilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/40671438912.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/1746561988.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/gobixevafaxezepibar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/80120406799.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/78215756225.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_off00007415.bin
baed2b2e879ea33058d9a254042875609d05969b0fe974751c281d5d5b4d2bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 5384 bytes
font_01_sfnt_off0000866e.bin
6b6e6ed672438e96c6103073e7da81a1748e4491d3a1e9d6455b9b2f5e90a631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866E 10296 bytes

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