Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57addd418d289c2…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 13:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a5da01cac053cb0377997aafa72f56d SHA-1: b86533cfff555b1ecf63e491ce52841dd704a233 SHA-256: b57addd418d289c222b71158549cb81d9805af9ba34375e98e512497336a803e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO manipulation or to obscure malicious redirects. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=volume+worksheets+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=volume+worksheets+pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5601/files/boston_market_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4780/files/mesotelioma_peritoneal_maligno.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/42258350861.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/92906929607.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/lomenixex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/60603794506.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/equidad_e_igualdad_de_gnero.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/62099846235.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/depij.pdf
    • https://static.usrfiles.com/ugd/599026_41f0cdfad01641088cc346f6625a2c31.pdf
    • https://static.usrfiles.com/ugd/739437_c5b21a50c6f5456db8dc42599427c833.pdf
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdf
    • https://static.usrfiles.com/ugd/808d8c_7ecbbc663b1f449a91f6bbb7fc415dd7.pdf
    • https://static.usrfiles.com/ugd/105a8c_4160c52477d64e9888d94d534b49ff8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2569b161aa84c88860415f8f74c45e8.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_off000073b2.bin
bbad159dc37edf873c1303b919360e1adbd93489dcace0e76068f72879737a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B2 5192 bytes
font_01_sfnt_off00008549.bin
991695c0cdd9decf5dbbdc05126052bac8c5a9f9dc5d10d7b36a6e898a7c47ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8549 10808 bytes

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