Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb2357b8d712b08…

MALICIOUS

PDF

47.4 KB Created: 2020-08-31 00:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b05ced07f42262148a69b2e9e75be9a SHA-1: 614fd9df8fe5cf69bd2742d6f6dee93da696a8ae SHA-256: deb2357b8d712b088daf6a5298a7b835d4bc9d1e92325ae910ebcc6a9669e935
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body text. This link, 'https://ttraff.link/wix?keyword=calculus+for+the+life+sciences+greenwell+2nd+edition+pdf', is designed to lure users by appearing to offer a specific PDF book. The document also contains a large number of embedded links to Shopify, likely part of a link farm to improve search engine ranking for malicious content.

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.link/wix?keyword=calculus+for+the+life+sciences+greenwell+2nd+edition+pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/58916504351.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/skilled_occupation_list_new_south_wa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/buzizobeseser.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/guxopunopudivezamewuwif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/winafenemov.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/bacteria_pathogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7719/files/icecream_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/35951552745.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/jonamem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/zakalozivakoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/kuzem.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/xutisugid.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/89271686836.pdf
    • https://cdn.shopify.com/s/files/1/0437/8725/5970/files/ashmore_park_nursery_ofsted_report.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_off000079d4.bin
a31bc7750081798e521a4a3664aa5805cde903b6b99609783caab0e34d7e6c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D4 5544 bytes
font_01_sfnt_off00008cb9.bin
16b8a853427a2a31178ecd1457a925c796faf5e776e6dd143639dfbbb097b371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB9 10656 bytes

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