Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85d0b7db5c1b5b5…

MALICIOUS

PDF

53.7 KB Created: 2020-07-22 07:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2cf58c44e7a8333655920c4c7166df SHA-1: a0f073a0137111cce6ad341091a2804393e716db SHA-256: f85d0b7db5c1b5b53df58aff16d16f3402d9e86f7a2da1d78bbcc31308c68149
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that these links are part of a link farm designed to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'functional foods' and 'diabetes', likely a lure to make the document appear legitimate. The presence of a malicious redirector URL is a strong indicator of a phishing or scam attempt.

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=functional+foods+cardiovascular+disease+and+diabetes+pdf
    • http://files.reikidesigns.com/uploads/1/3/1/3/131379815/tusabutoporod_josoxel_litoloxinob.pdf
    • http://files.buyrefugeecandles.com/uploads/1/3/1/4/131438098/lepinuzodoladar.pdf
    • http://files.jadeselevation.com/uploads/1/3/1/8/131856191/86f8f.pdf
    • http://files.maximisesportstherapy.com/uploads/1/3/2/6/132681773/7571d95ee8e8.pdf
    • http://files.advisorthoughtleadersummit.com/uploads/1/3/2/7/132710756/529535.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/44853753600.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/78330519925.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/benegaraxuvexebanebes.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/nixidaxotome.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/94922317498.pdf
    • https://murulejam.files.wordpress.com/2020/06/71345177684.pdf
    • https://vafosanego.files.wordpress.com/2020/07/fojowiborazukixiwam.pdf
    • https://vifilajezuro.files.wordpress.com/2020/07/94459037320.pdf
    • https://vutazig.files.wordpress.com/2020/07/62577694117.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/84977897308.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/91755894435.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/42885507613.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/14297140832.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/jerejapimetojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/28383357794.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/98858571177.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/wewalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/pekek.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_off00009438.bin
5f40cfe43395193740a0ed103a4e5ab502daba7714dc908d5f2c1ad4606f5a63
pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 5184 bytes
font_01_sfnt_off0000a5e3.bin
c173b41702161c594f8fafc8d5c2d1acf7f5f1b6d786d1af99336b177fa979bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 10116 bytes