Malicious PDF — malware analysis report

Static analysis result for SHA-256 57271c31e6574f39…

MALICIOUS

PDF

56.2 KB Created: 2020-08-12 02:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66a351073deede346be3767a964a062c SHA-1: 110378463c4e334de9b05cba9fb73a8aaee2003b SHA-256: 57271c31e6574f3959e108f43f85d530d262dba2ac45e8cd8e123ef71287e3bb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious redirectors or SEO-optimized PDF farms. The primary malicious link identified is https://ttraff.cc/pify?keyword=collins+cambridge+checkpoint+english+workbook+7+answers+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to educational materials, suggesting a lure to trick users into clicking these links.

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.cc/pify?keyword=collins+cambridge+checkpoint+english+workbook+7+answers+pdf
    • http://files.jennifernunweilerrmt.com/uploads/1/3/0/7/130739116/jofine_lirakimoja.pdf
    • http://files.maimonidesminyan.org/uploads/1/3/1/6/131637889/4179854.pdf
    • http://nabenezu.ffcalaska.org/uploads/1/3/0/8/130814526/7125363.pdf
    • http://files.silvercreekbiblefellowship.com/uploads/1/3/0/7/130775171/kixofokuvexesagalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/ccna_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/mevazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/fundamentals_of_analog_and_digital_electronic_circuits.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/30143833767.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/zenugakenaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/65418101567.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/cartilla_accord_salud_plan_310.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/bosel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/16406614878.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/design_thinking_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/reliability_centred_maintenance_moubray.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_off000095f5.bin
de53f526cf4a882aa5f86d4c25198844f0ff2dc087386f881248f6922326fb5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F5 5852 bytes
font_01_sfnt_off0000a9bc.bin
e3e5e395380b92bb954efc2a4c5b2450b0cae608ce1d4ff28cf2e7f67dcdb2ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9BC 12732 bytes

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