Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2b20fceca4b0e5…

MALICIOUS

PDF

54.5 KB Created: 2020-08-20 07:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 700e74a56b58888db71b3550a7fdf1df SHA-1: 26a152210eb4b8f7bfba6309dd3f6c073f01614f SHA-256: cb2b20fceca4b0e59c2db5875fec2d666773bd9cc0c7e282617c1f0fdcfc78d1
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=barlow+condensed+bold'. The document body also contains obfuscated text and references to the 'wkhtmltopdf' tool, suggesting it was programmatically generated. The presence of many external links, including one to a malicious redirector, indicates a probable attempt to lure users to malicious content or manipulate search engine results.

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=barlow+condensed+bold
    • http://files.teachingkidstothrive.com/uploads/1/3/1/8/131856715/8596130.pdf
    • http://bimabilo.kibafreemanart.com/uploads/1/3/1/4/131437508/vigawejurobenu.pdf
    • http://buvisipo.kavkid.com/uploads/1/3/1/0/131070313/xupake_titeruteg_minojanenukuk_zebotaw.pdf
    • http://files.postplumbingheatingandair.com/uploads/1/3/1/8/131872298/67553204c47.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/95059779127.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/poxoputevovoxikobifoni.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/carbon_black_sensor_removal_tool.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/xefakusegubosuzerape.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/dexemajin.pdf
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/99274690626.pdf
    • https://cdn.shopify.com/s/files/1/0435/5591/3879/files/career_path_electronics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1083/files/71202199622.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/60185027527.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/1602428898.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/zeretarefeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0459/0452/7514/files/javatpoint_core_java_tutorial.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_off00006208.bin
83e6c11f4d4c093b91417760ab57415e68a4fb4000b406963557b8f82330e051
pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 13968 bytes
font_01_sfnt_off00008f2b.bin
7186e571dcd9b43b50c784ee04552c87f24f636a715ec5d58f44e3e7674de4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2B 5216 bytes
font_02_sfnt_off0000a0fe.bin
9b8c40622a743a61d70a18566ed6c0e4346926bdc3f3b2849dbe1d33d5a07868
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FE 13976 bytes