Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ea9ddce7c5fa03…

MALICIOUS

PDF

43.1 KB Created: 2020-07-27 08:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 816e4736b23717810ce71075637b4195 SHA-1: 6c9d4ed5c22471820d92ba7e152613ef93ed73f7 SHA-256: c1ea9ddce7c5fa032128eea78bbd09faea4c21b139bde87fe6cac916576438dc
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One prominent URL, 'https://ttraff.ru/pify?keyword=application+letter+sample+in+nigeria+pdf', is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Application letter sample in nigeria pdf'. The presence of a malicious redirector link and the link farm structure strongly indicate a phishing or malicious redirection attempt.

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.ru/pify?keyword=application+letter+sample+in+nigeria+pdf
    • http://files.navigatingbeinghumantherapy.com/uploads/1/3/0/8/130813592/2356795.pdf
    • http://files.jkenwellstewart.com/uploads/1/3/1/3/131383934/fasazukidokubu-kalub-torasanawonorum-zotafanolajewe.pdf
    • http://files.lazarushandplane.com/uploads/1/3/0/7/130739268/notomepofebak.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/24850081054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/wuzaligomiparujowit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/29391153142.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/83160999932.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/98178917669.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/xalufuwibatas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/70964431243.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/43201717574.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/11149497500.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/58860668524.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_off00006ab6.bin
09174f07a2bf0f019797323e655773dbeeb41dacd41290215689573ec69fe186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 5252 bytes
font_01_sfnt_off00007c6e.bin
0833879507d05481907777fe628b2daa5c74b23d68f0fb832fd4e7481a57b58f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6E 10352 bytes

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