Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39edc37fb017990…

MALICIOUS

PDF

34.0 KB Created: 2020-08-12 06:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d672a074c11a83ec182d24b208f9c4f SHA-1: 5185048103dc049f458f3db8bdc0655d8494d07a SHA-256: c39edc37fb017990737da9c77c3a38dac9ddd85e9e1aedf9fd7d06dfd74e5e80
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=aircraft+structures+engineering+students+pdf. The document body, though partially corrupted, also contains this URL and numerous other links hosted on cdn.shopify.com and various other domains, suggesting a link farm or redirection scheme designed to lead users to malicious content.

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=aircraft+structures+engineering+students+pdf
    • http://files.jenniferblush.com/uploads/1/3/1/3/131380445/widiwa-jamot-xiniza.pdf
    • http://files.doggiedaycareconsulting.com/uploads/1/3/1/3/131384175/nolidevowa_dufuponalasini_bomudoto_togof.pdf
    • http://files.friendsmpl.com/uploads/1/3/1/4/131407459/cc6071.pdf
    • http://juwidil.stutteringtherapyaz.com/uploads/1/3/0/7/130776647/5ca6ea5abfd4.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/72242633693.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/agenda_2020_au.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/bosaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/49920469970.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/describing_personality.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5789/files/15338547450.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/gudimopuzizedufojifikifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/45172525872.pdf
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/xozozatetevelezoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/43527873587.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/jokixopejalevatanarexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/23455749078.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/makalah_batuan_sedimen.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_off00004923.bin
f9d57b3dfcb7479d7ce171daf5c77fff92c8dd29250e8ac2a68707de7302d969
pdf-font-stream PDF embedded font (sfnt) at offset 0x4923 5280 bytes
font_01_sfnt_off00005b1a.bin
e089cf91daf8bb5c523f2b6d6c360aa49c8b37af8f067bef11938ea83794bba1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1A 9300 bytes