Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef50eb42177e556a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 15:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2c367850e6909111f6a746fc2dd508 SHA-1: a3560825331b3296d0337892947a28c6f1499aa0 SHA-256: ef50eb42177e556af2dd5fded8f523dfa0bcfa943e41d29370fa913326ca58a2
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one pointing to 'ttraff.cc', suggest a redirection chain designed to obfuscate the ultimate malicious destination, likely a phishing or malware distribution site.

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=hoja+de+seguridad+anilina+pdf
    • http://lixip.obxelectricians.com/uploads/1/3/2/3/132302815/xatesol_runusinewixo_jobulomit_bogovuzitafuvum.pdf
    • http://gefezaze.drinkinthearts.com/uploads/1/3/1/4/131437363/7b5e52.pdf
    • http://bukar.riverlandsequestrian.com/uploads/1/3/1/1/131163601/jevokixeto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/favunubasaviwujekegu.pdf
    • https://cdn.shopify.com/s/files/1/0449/7873/3224/files/beginner_ab_workout.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/43154079220.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/nekajufezolak.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/12v_battery_charger_with_auto_cut_off_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/rumufawobasulufatogofuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/vuxad.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/mathematics_hl_option_statistics_and_probability.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/daily_camera_voter_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0436/5415/2342/files/jujezawixozatubesodamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/xuwokojutoxilitoxural.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_off0000615c.bin
11eee46b3f096722effce93b02313e65023e3e7cb512b2cfd3f1d33e93b2089a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 5244 bytes
font_01_sfnt_off00007347.bin
a2f35e180f3d6091821342d10e300eb18d48870e44da83502331c70fbecb8bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 11216 bytes

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