Malicious PDF — malware analysis report

Static analysis result for SHA-256 308a5b29c23e2639…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 04:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83c4c74fc6f80e64e655a445ea60ef15 SHA-1: b015685d370732f84b0ee82ccf5babc10c808deb SHA-256: 308a5b29c23e2639d421fc6189cdcc1fa4efdcb5f1be2227a90c2c0ad95bd5d1
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body and extracted URLs suggest a lure related to job opportunities, directing users to a URL that appears to be part of a link farm. The primary malicious URL is ttraff.cc, which is used to redirect users to other content, likely malicious.

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=all+bengali+job+newspaper+pdf
    • http://mepin.breakingbarriersoregon.com/uploads/1/3/1/4/131406381/9143765.pdf
    • http://migela.austinamericorpsalums.org/uploads/1/3/1/0/131070198/belutofobotizal_pubas_jirutedudan.pdf
    • http://files.simpletens.com/uploads/1/3/1/4/131453969/safoxupor_jamunana_bemoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/bedufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/22047981939.pdf
    • https://cdn.shopify.com/s/files/1/0440/5487/2214/files/biladu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/migoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/nogexepufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/dawis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/bedid.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/69063165323.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/certina_ds2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/87716509794.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/dotexele.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_off000069e7.bin
540c4593cd77b9fc3cec65ff179b4c768b07731aa85baeb30fdef212335de0aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 5504 bytes
font_01_sfnt_off00007cb7.bin
47fe5b2b4f4d6373d3ebf9d879025062cb80c8f313cbeaf18b21940441e8bb1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB7 9816 bytes

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