Malicious PDF — malware analysis report

Static analysis result for SHA-256 f21fb15c098d7c5a…

MALICIOUS

PDF

58.0 KB Created: 2020-08-14 03:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a37c5eb8cd1d8482c752f6ff05a737 SHA-1: 29bb4367b3e928ba5738c7dc38872e024e9e5c88 SHA-256: f21fb15c098d7c5aad131f6b41fddbe5be15ac0d559b9e3fcdf23880f4873855
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=absorption+spectra+of+photosynthetic+pigments+lab+report', is a primary indicator of malicious intent. This URL likely leads to a phishing or malware distribution site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination.

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=absorption+spectra+of+photosynthetic+pigments+lab+report
    • http://sifito.mitigationwines.com/uploads/1/3/2/6/132680903/bfbbd5.pdf
    • http://files.hallelujah-lighting.com/uploads/1/3/0/7/130739015/8826658.pdf
    • http://lonezum.carolynleighthomas.com/uploads/1/3/0/7/130776213/deruruwikeb_delobatikikude_rumutoge_xevogorurigef.pdf
    • http://files.eelasor.com/uploads/1/3/2/7/132712174/xoreweni.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/xobafoliwimuzaxebujitosob.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/76641159328.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/problemas_psicologicos_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/61679688234.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/security_risk_assessment_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/wupusofanerulowoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/xololizefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/acca_f1_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/4843007075.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/jizomanirilogixerugewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/harry_potter_and_the_cursed_child_characters.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/nesegifugujopuporilo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/77832537783.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_off00009a11.bin
8cefc333bdf6c9993e2e9118f8bddd964f0e8da796ca5fa320ae467b2912ca53
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A11 5660 bytes
font_01_sfnt_off0000ad23.bin
1455b1b5cdbfe96399a9149b40054f88f90c7291d736cb31502d4cb0aa17d4e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD23 14708 bytes