Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c511ff6e136240…

MALICIOUS

PDF

35.2 KB Created: 2020-08-25 18:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fc54314144187df187a9fd853048736 SHA-1: ea1d2f2adf140a8c506d45166617e988cba16331 SHA-256: 21c511ff6e13624021556dfacca7776e939a4aeba4af91238c9357aa2104ad4e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary URL pointing to a redirector service. This suggests a phishing or malicious content delivery scheme where the redirector is used to obscure the final destination. The document body itself is heavily obfuscated and contains numerous links, reinforcing the idea of a link farm designed to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=diftongs+i+hiats+esquema
    • http://files.vtrustjournal.com/uploads/1/3/0/7/130775760/5738340.pdf
    • http://files.rockiesshrine.com/uploads/1/3/1/8/131856492/lusitonuniwejononob.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/american_standard_air_conditioner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/niboduxirapoxogowil.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/83339355006.pdf
    • https://cdn.shopify.com/s/files/1/0444/6869/9303/files/ibm_aptitude_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/92715800110.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/nexiluwupozisovijanazepu.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/samsung_frp_bypass_apk_rootjunky.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/xujesuponozabaloxokogeki.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/template_for_personal_finances.pdf
    • https://cdn.shopify.com/s/files/1/0438/4279/7730/files/gadiximupob.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_off00004cb5.bin
2c9dc91d1501404455d107bf59b50748f35a6625608d1252dbb316a329153b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB5 5176 bytes
font_01_sfnt_off00005e35.bin
b87735ff80707b2aeb7d2fdc6a9c6c3086317d8d29dd09b6b0cd06f49f6dddc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 10064 bytes

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