Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3ef5d638bc3f72…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 04:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b292c8476f1d718dc45137e1994dd00d SHA-1: 109241ce1deec451ad931209601cdb1080a1a7be SHA-256: ea3ef5d638bc3f727685db0c712aa908913c2c5e9f0b422b68c1e0a38df15f0c
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, https://ttraff.cc/pify?keyword=codices+prehispanicos+de+mexico+pdf, points to a known malicious redirector. The document also exhibits characteristics of a PDF link farm, with many links pointing to external PDF files hosted on various domains. The primary attack pattern appears to be social engineering through a lure document that redirects users to malicious infrastructure.

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.cc/pify?keyword=codices+prehispanicos+de+mexico+pdf
    • http://furogiz.indypolevaultjumpscamps.com/uploads/1/3/1/6/131606490/642613.pdf
    • http://files.mounthorebccl.info/uploads/1/3/0/7/130775308/5059560.pdf
    • http://files.svea1988.com/uploads/1/3/0/8/130874379/garumamezup.pdf
    • http://files.gratiotfarmersmarkets.com/uploads/1/3/1/1/131164202/zojetubokaki-pezita.pdf
    • http://robasovav.scarfitup.org/uploads/1/3/1/4/131437886/7dd15fd2962cb.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/zenith_remote_controls.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9551/files/tijipifolibexoseninar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/judopoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/viseneki.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/95056294087.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/39990541592.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/poe_chaos_recipe_filter.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/aditya_hridaya_stotra_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/71277503753.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/51172857730.pdf
    • https://cdn.shopify.com/s/files/1/0437/9276/0981/files/suprema_access_control.pdf
    • https://cdn.shopify.com/s/files/1/0440/4379/6645/files/50580123470.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_off0000674d.bin
fe75647a56ad106340b4440b45196f76cab8796c12e6786f3ad31e08e4149d6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x674D 5336 bytes
font_01_sfnt_off00007949.bin
803551e3230e58826e4486cf0bfb8649777d4657b43f1e2edc34acdfea91ddfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7949 9752 bytes