Malicious PDF — malware analysis report

Static analysis result for SHA-256 7941a0d40e9fd575…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 20:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6220651eb818a19339e21b3539825048 SHA-1: 82fd4a4bd80c5cfcb387d502bc1b0a6077cd8099 SHA-256: 7941a0d40e9fd575dc2a981af3b9fa17852373af6a5f69a9452a41201bbe3ed1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at `ttraff.cc`. The document body, though heavily corrupted, appears to contain a title related to 'Chiavenato introduction to general theory', likely a lure to disguise the malicious intent. No scripts were extracted from this sample.

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/wix?keyword=chiavenato+introdu%25C3%25A7%25C3%25A3o+a+teoria+geral
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/57401905652.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/82817805928.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/kibusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/tepimalalojixijaxulanam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/masegoduxivav.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/20717496300.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a9ccaf4b064448a86884bd602857cf8.pdf
    • https://static.usrfiles.com/ugd/9219f8_6c7ddd02f79f47af8b133ed00b18c906.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0bf76ed2e9d4340941d420442a5ad67.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/lapadosawupis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/clinical_nutrition_and_dietetics_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/jurik.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/xegimikaxubidulalot.pdf
    • https://cdn.shopify.com/s/files/1/0461/4455/3123/files/tp-link_pharos_cpe210_manual.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/
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/xe

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ada.bin
185f22848352783f7d01ec01e27993498e529e895ec3df4232dbaab0e63de88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADA 5376 bytes
font_01_sfnt_off00005c87.bin
f613ba464fb279d76cfd3eafd5d5af2dbd7a6a09ea810187f88a188aa94a38bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C87 10388 bytes
font_02_sfnt_off00007bd7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 4324 bytes

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