Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c7569a79dae803…

MALICIOUS

PDF

44.4 KB Created: 2020-08-12 14:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb20eb5bef7dc899a206f06208a805f SHA-1: 2f4002cfcd56192d6cff6d34a76b622ea9ed995d SHA-256: 77c7569a79dae803af6664feee8397fef52bf388dddfc41b7d95ae7426200e5b
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=lehninger+pdf+biochemistry'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm further supports the malicious intent, aiming to obscure the true destination. No scripts were extracted, but the embedded URL is sufficient to classify the attack pattern.

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=lehninger+pdf+biochemistry
    • http://files.beatbettingtips.com/uploads/1/3/1/1/131164063/getuvujapi-gabixemubumabi.pdf
    • http://natexizi.zevkali.com/uploads/1/3/1/3/131383483/tunirijukag.pdf
    • http://files.stjeromelibrary.org/uploads/1/3/2/6/132695372/doxaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6319/7337/files/78507445285.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/11822772350.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/voruwamagomef.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7837/files/rglement_d_ordre_intrieur_de_l_assemble_nationale_de_la_rdc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/julufuwepafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/49796415798.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/69093860578.pdf
    • https://cdn.shopify.com/s/files/1/0428/2050/1660/files/crown_dc300a_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/jetatosebukixuzisane.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5789/files/7317161262.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/microsoft_excel_formulas_cheat_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634f.bin
ad9d647997f3613c1530a90de5743d091948171662a0959d5a39aea8844ff1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5296 bytes
font_01_sfnt_off0000751f.bin
44af7eae86788e36411c2f2b14ae1df3e059ea3b64282dcb2f195ca4951d73eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751F 9868 bytes
font_02_sfnt_off000096e0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E0 4324 bytes

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