Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0add0bc922edef6…

MALICIOUS

PDF

41.1 KB Created: 2020-08-13 01:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9aede086440c4fa4b967a8b369f6d3 SHA-1: 64c18cac1eb5aefefbe47adf9df9c2560dbb7676 SHA-256: f0add0bc922edef6ed29ce8edcbe3a8d104bbd0900c03d835561b692a7499161
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external PDF links suggests a strategy to either distribute malicious content or manipulate search engine results. The primary malicious IOC is the redirector URL.

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=absorption+and+adsorption+pdf
    • http://fuleserix.sausagedogproductions.com/uploads/1/3/1/4/131483200/729052571bae.pdf
    • http://files.shelbyssweets.org/uploads/1/3/1/4/131438682/javab-bivonetuj-fisevo.pdf
    • http://files.nativeresistancemusic.com/uploads/1/3/0/7/130740510/8501096.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/watch_madea_goes_to_jail.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/69188641435.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/xabazunuvejototub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/82856646330.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/anandamath_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/nupipujetisedofo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/94917885834.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/wowekozuwolabaxipit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/29152317607.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/7680413892.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/gepoxefaj.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_off0000643f.bin
8300b827896d2f81132be04f51a1053e06dc1dd4dcf55c3be3169aa798e4ba72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 5132 bytes
font_01_sfnt_off000075b4.bin
30f77450677ab7c8db260db582108b87416c040f76710ae78a30116cb289058d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B4 10040 bytes

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