Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc79c9bc28515642…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 00:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 893937c35db1434c221f5dff08e3ace1 SHA-1: fdc76c1a09f30c19ac59dda5ada07d58ff71a525 SHA-256: bc79c9bc2851564287fa1fa55d8c68e51cada8771d7f11c368614cfd6d0fab41
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=sydney+tv+guide+foxtel'. This URL is presented within the document body, disguised as a TV guide link, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content but serve to obscure the malicious destination. The primary malicious URL is the highest priority IOC.

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.me/wix?keyword=sydney+tv+guide+foxtel
    • https://static.usrfiles.com/ugd/b8c837_f3f4a0e144e5436d86d7252bc50e2254.pdf
    • https://static.usrfiles.com/ugd/8de238_0277f8ae94cc4d11a77662030bebb12d.pdf
    • https://static.usrfiles.com/ugd/429b25_0cc8f12dc79f414593ed76426190d2c3.pdf
    • https://static.usrfiles.com/ugd/8ba634_2dd6a02cec59414f953d4f7ca886643e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/31450423673.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/lipid_classification_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/bitwise_operators_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/32579876936.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/libro_la_ley_del_espejo_yoshinori_noguchi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/37770958159.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/77277178101.pdf
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/metabolite_identification.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/adblock_android_xda_developers.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_off0000701d.bin
52b284acf097d1295f0aded1725871ae7803f3df60460713f5252e285260e1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701D 4924 bytes
font_01_sfnt_off0000810e.bin
989d7d57f6743cf7ee9148745c2f42f55b7d05db1fadab62f327f47f3caeda3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810E 10608 bytes

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