Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3365a58d2d2d335…

MALICIOUS

PDF

40.9 KB Created: 2020-07-10 13:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43ae65d87fd8e76de3330eff232caea8 SHA-1: 9571e849c611689e9b88e04ca035b98542dbf926 SHA-256: a3365a58d2d2d335df08086a0de9ae8e68ffcda4170879b63d3527d373b93c2e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though partially corrupted, indicates a lure related to 'Norse gods and goddesses worksheet'. The primary attack pattern involves tricking the user into clicking these links, which likely leads to malicious content or further compromise. No scripts were extracted from this sample.

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/wb?keyword=norse%20gods%20and%20goddesses%20worksheet
    • http://files.sheldonxink.com/uploads/1/3/1/4/131406274/8491542.pdf
    • http://files.worldclasslanguagesolutions.com/uploads/1/3/1/6/131606175/tesejetexilo.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.mrohagan.com/uploads/1/3/0/9/130969085/6729064.pdf
    • http://files.highbyte.com/uploads/1/3/2/6/132681448/jalumilesetofen_xedavavob_mopuloja.pdf
    • http://files.thegroovedudes.com/uploads/1/3/1/4/131411024/daximubavilisubunili.pdf
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.pdf
    • http://files.academicpointe.com/uploads/1/3/0/7/130775509/ef8f6.pdf
    • https://zotevewu.files.wordpress.com/2020/07/78027180851.pdf
    • https://dexuzonuluw.files.wordpress.com/2020/07/58128066329.pdf
    • https://nojilibap.files.wordpress.com/2020/06/lekugisatepepuvubagirar.pdf
    • https://runaxebeja.files.wordpress.com/2020/06/39292305136.pdf
    • https://pamegalelumi.files.wordpress.com/2020/07/92213690858.pdf
    • https://vinafomivama.files.wordpress.com/2020/06/tajikekupikeludode.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.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_off00006331.bin
a88c990d675702c035dbb211d623c50eff1c9cb38a2df5f9060f01d2731df428
pdf-font-stream PDF embedded font (sfnt) at offset 0x6331 4920 bytes
font_01_sfnt_off000073f5.bin
9f9bc870ef157c0bdf473681ab494660c96dcc53edec4406faafd7692939ea19
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F5 10040 bytes