Malicious PDF — malware analysis report

Static analysis result for SHA-256 c640be83b47e0da7…

MALICIOUS

PDF

36.4 KB Created: 2020-09-01 06:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab55227d4b23cdf68a08bff95359077 SHA-1: c95b19d4982ead7c59cb4fbe9b2f69a5bc6448ac SHA-256: c640be83b47e0da72fc49167c0c515e903528099a8a9b0751a976ea5bb58ab88
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical malicious redirector link to 'ttraff.me'. The document body, though malformed, suggests a lure related to 'Astounding Science Fiction October 1953 PDF'. The presence of a link farm and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a compromised site or phishing page.

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.me/pify?keyword=astounding+science+fiction+october+1953+pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/kezeloru.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/letadupagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/616683152.pdf
    • https://static.usrfiles.com/ugd/c33cdb_925237723484487a8a46ad78b1f27cee.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/jegonalosafem.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/bawupunibexojuluke.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/15450553970.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/marvel_future_fight_apk_data_offline.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/afp_medical_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/pixori.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/probation_officer_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/gifok.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_off00004d78.bin
c76c152103ba9910494ca05d6260c5e9889484ac18c3404a08bb34809b08576a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D78 5708 bytes
font_01_sfnt_off000060fe.bin
7f45808569caa606a5c8869182c4ec64fc5b471e46bf0ee51fc67cfd3da18609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FE 10556 bytes

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