Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bbb0bfedddb798…

MALICIOUS

PDF

55.5 KB Created: 2020-08-23 02:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b33fbbd3875eeb9e26cf9a327adde1 SHA-1: 5594f73c7344f6dcd6b86aa7ce7dec0f30e195d8 SHA-256: b1bbb0bfedddb798e9552f3e62ec39bb38a49c69cf73e0f81775cd593ebe2aed
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL 'https://ttraff.ru/pify?keyword=factoring+review+sheet+algebra+2' is a primary indicator of this malicious redirection. The document body, though heavily obfuscated, contains text related to 'factoring review sheet algebra 2', suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=factoring+review+sheet+algebra+2
    • http://pilavu.tiffanycrowhurst.com/uploads/1/3/0/7/130740019/c2fd644a51dc9.pdf
    • http://files.dispatcherdame.com/uploads/1/3/1/6/131606861/vasipiv.pdf
    • http://jezosa.stpetersaustin.org/uploads/1/3/1/4/131438860/7687563.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/86861019314.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/37782254678.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/17866367698.pdf
    • https://cdn.shopify.com/s/files/1/0463/0645/9810/files/energy_transfer_and_transformation_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/najovivujen.pdf
    • https://cdn.shopify.com/s/files/1/0437/3489/2693/files/durisoxufazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/58015251998.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/xewelebizulame.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_off00008ef8.bin
c073469ca43ad140abdf94c0872d7308819ab5ada98e75d361e449ff72aa1b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF8 5440 bytes
font_01_sfnt_off0000a18d.bin
88ef4cca8d0eaa7f0dd0e8bdc4408831bd733519a709659a5410dbc87b6ab938		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA18D 15552 bytes

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