Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ece84d62d8f3059…

MALICIOUS

PDF

36.4 KB Created: 2020-08-20 10:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7a4772bb5a86e4293b57c492b287f56 SHA-1: 105694c1441d242fbfe66111f65039f861927f4f SHA-256: 3ece84d62d8f3059d209aaca26f10ab2e7271a99704166be8185973888c67fa8
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a software download. The document body, though heavily corrupted, contains the URL 'https://ttraff.ru/pify?keyword=sql+server+2014+free++filehippo' which is flagged as a known malicious redirector. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm used for SEO poisoning to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sql+server+2014+free++filehippo
    • http://files.nottinghammassage.com/uploads/1/3/1/3/131384306/3073693.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/98587052423.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/511586858.pdf
    • https://cdn.shopify.com/s/files/1/0438/7504/1435/files/despicable_me_3_trailer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/50790457502.pdf
    • https://cdn.shopify.com/s/files/1/0432/2734/9159/files/shoemaker_levy_9_reading_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/25300479431.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/74478475276.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/save_gif_from_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/2059908227.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/23286528600.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/bujofisalujas.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_off00004f6e.bin
a589a7d6c054688d27e37d8157e3612c97fafc8dac71089cf0b764832e4f2538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6E 5484 bytes
font_01_sfnt_off00006224.bin
827173ec1df02f1222d8f2b3a0ed4d09934c1883e181c2037eb8b5e0e987c6e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 10296 bytes

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