Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01868f29b4710a0…

MALICIOUS

PDF

37.8 KB Created: 2020-08-07 01:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995e3404f49b809ec4f9eb2bd65bac3c SHA-1: 9283326eb529d30a4460745c669e29db42cd60fd SHA-256: b01868f29b4710a0a33e15832d066f574136222bf996c4e98f27e42fb2c4aa92
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one pointing to a known malicious redirector (ttraff.com). The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of hosting numerous links, likely for SEO poisoning or to distribute malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links suggests a delivery mechanism for further malicious content.

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.com/pify?keyword=alfonsina+y+el+mar+vocal+score+pdf
    • http://razabulob.torrentengine18.org/uploads/1/3/0/7/130738799/zanimeze_mubumizaj_mekobaxax.pdf
    • http://files.refreshglobalnfp.org/uploads/1/3/0/7/130775361/finolivekilebefev.pdf
    • http://files.greyart.net/uploads/1/3/0/9/130969191/zekatamedepameb.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/xumobuporewujujekogerokev.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/nexulovoguwutakigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/antibody_structure_instability_and_formulation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/us_passport_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/talijofazejodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/17606638224.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/vidunikus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/bratstvo_crnog_bodea_kralj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/nowobenidelinetadegenupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6423/files/sagenumuraxubabosede.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/gaxaxuzuju.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/law_student_resume.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_off0000554e.bin
ebc99458811245166b1ad48ad7bfce48275fa6329460f83f71b76f0acfc05cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554E 5452 bytes
font_01_sfnt_off000067d8.bin
db230770d25a8a00cfb6233e237d623571ae2bcecac2fe0455fec13c375a2d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D8 10144 bytes

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