Malicious PDF — malware analysis report

Static analysis result for SHA-256 eceb76ba1eaa90e8…

MALICIOUS

PDF

46.1 KB Created: 2020-08-15 01:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a515d6ab4b830e9def8553c54d814376 SHA-1: eafc6551e15bbcb08bda2ab2c290531ae849ee18 SHA-256: eceb76ba1eaa90e8778eceeb1d471f29e863d6f62c6470038d6c37cc103b74e3
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=construction+estimate+template+pdf. The document body also contains text related to 'construction estimate template pdf', suggesting a lure to trick users into clicking the malicious links.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=construction+estimate+template+pdf
    • http://files.zestnaturalmedicine.com/uploads/1/3/2/7/132740352/sanagevim.pdf
    • http://mutop.therangestoreefservicedapartmentgroup.com/uploads/1/3/1/4/131407089/fimoketekobupagopaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/anatomie_articulation_genou.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/vefamomal.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/jizirotodukoselevigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/discretionary_trust_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/74941156078.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/55203768866.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/sintomas_de_anemia_megaloblastica.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/44359159787.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8763/files/xuxodafi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5130/9473/files/sybcom_business_management_book.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_off0000774a.bin
88182aeaae28efdc3f4fdd4e2aa3101ffc97c953301ea29c6833cb321adb3fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774A 5208 bytes
font_01_sfnt_off000088e5.bin
a45fc83ae39496f0006af989264faa77fa841fbd251951748e7af2fe8b564e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 10272 bytes

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