Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5985964be70d35…

MALICIOUS

PDF

44.3 KB Created: 2020-09-28 15:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01798abb4af6897d9c13e2ae2a929339 SHA-1: 13fe53d7484e1a1696302f8e210d79266bad1582 SHA-256: 7a5985964be70d35c3df6a991f141b60fe32369d904a67b59389a012d304698a
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The primary malicious URL is https://gettraff.ru/mozel?keyword=algernon+blackwood+wendigo+pdf, which is likely used to funnel users to further malicious content. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/mozel?keyword=algernon+blackwood+wendigo+pdf
    • https://site-1037279.mozfiles.com/files/1037279/givakozapoxikik.pdf
    • https://site-1036731.mozfiles.com/files/1036731/zudorozowewi.pdf
    • https://site-1036667.mozfiles.com/files/1036667/tefezemujusuziwanogew.pdf
    • https://site-1036754.mozfiles.com/files/1036754/57406321422.pdf
    • https://cdn.shopify.com/s/files/1/0434/9712/8088/files/fan_made_pokemon.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0293/files/asus_rt-ac68u_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/58225737325.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/jowapatupolekuwexekujoxaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4461/6864/files/44532145778.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/zexoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/5856/1175/files/rudram_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/39581577223.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/14600114984.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_off0000708c.bin
6ff53577ab7e9ca9add9a35206d5b390f0b45a752453e690e7d033bea0a4031c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 5428 bytes
font_01_sfnt_off00008324.bin
2fd87a449059c5d39e467edc78818536ee91fea9bf3fd0c2ad49c52c38b6cb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8324 9776 bytes

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