Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa830bfa64ef53f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 13:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e24f342461663774ec30af1976530d5 SHA-1: 25af4c33b87cd583304248903cfc3c92d8d52ef7 SHA-256: cfa830bfa64ef53f79eb6c5aae49a30eb5eaa24977012edbbc6ffdc5207d2c60
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cinema+apk+not+working'. The document body, though heavily obfuscated, contains this URL and references 'cinema apk not working', suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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/pify?keyword=cinema+apk+not+working
    • http://jolusibam.rivercitygivers.com/uploads/1/3/0/8/130874388/b3ea954e2.pdf
    • http://files.aardvarklearningacademy.com/uploads/1/3/2/8/132814050/gejozajud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/povumad.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/29143189835.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/58710144374.pdf
    • https://cdn.shopify.com/s/files/1/0429/6189/5587/files/lefuturudog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/neboxiduxaxurajof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7682/files/tekubugezirevubilojavavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/scope_statement_in_project_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/letter_of_intent_pharmacy_residency.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/green_day_american_idiot_songbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/32017221995.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/astigmatism_aberration.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_off000066a7.bin
477ae09c916536030e8c3510aec974b63d52df51d69b664f17483b5bb23561a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 4992 bytes
font_01_sfnt_off00007797.bin
992dd502f1c2e4d62a139ae18ca3456e2fa11a4a81de722787da1b590b91bf20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 10280 bytes

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