Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf5fc0c5547c607…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 04:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c4da9eac6a8a77b7ac5c387d9e93a3d SHA-1: b99501aafbe37ddf8bc726cd8e286157b990b334 SHA-256: dbf5fc0c5547c607edbfbcf3aa502f27dd0a579bbf8e668440d3b98ac0371d51
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.com/wix?keyword=antibiotics+in+early+pregnancy+and+congenital+malformations, which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous other PDF links, likely to obscure the malicious destination and potentially for SEO manipulation. 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.com/wix?keyword=antibiotics+in+early+pregnancy+and+congenital+malformations
    • https://cdn.shopify.com/s/files/1/0454/7356/2790/files/navifote.pdf
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/17268394757.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/popazunijonaritez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/95032939930.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/luralipelogibemaxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/loxesamipifixowuvedifexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/zuros.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/wamib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/73748664008.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/fuzzy_mathematical_programming.pdf
    • https://cdn.shopify.com/s/files/1/0440/9619/2664/files/aptitude_test_questions_and_answers_in_nigeria.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_off000072a6.bin
0847bf1afb0d39cb0a7e3cfa0576e39dc2ce4c5912016e431b3f20d00299d3fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 5708 bytes
font_01_sfnt_off00008602.bin
18252a02e8005f54dace4499da3039da9da692f85807c1c57b8d8708935bd60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 10196 bytes

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