Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd43301a87549c39…

MALICIOUS

PDF

57.3 KB Created: 2020-08-31 23:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 489d00579519728e642fbcd5982c0b08 SHA-1: 437b41a6c7065f596166f08791da03fd9e0eaabc SHA-256: cd43301a87549c39aac2228e657f40ddd4ef3768a984060d47a2c4194c9d911b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=apprendre+l%2527+anglais+rapidement+apk'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links, including one to 'https://cdn.shopify.com/s/files/1/0437/1801/7175/files/good_night_gif_images_hd_free.pdf'. The document body contains garbled text but includes the target URL, suggesting an attempt to disguise the malicious link within seemingly innocuous 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.ru/wix?keyword=apprendre+l%2527+anglais+rapidement+apk
    • https://cdn.shopify.com/s/files/1/0437/1801/7175/files/good_night_gif_images_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/what_color_is_gunmetal.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/nudafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.pdf
    • https://cdn.shopify.com/s/files/1/0459/6590/1991/files/atividades_ossos_e_musculos_8_ano.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/mokupukurozitapiwen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7485095273.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1845/files/az-_900_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://static.usrfiles.com/ugd/52b593_19a071863f89475cb6f877072c4a64de.pdf
    • https://static.usrfiles.com/ugd/0aab01_62ac532709fe4ea98dd96f20154977bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2caabb41684b3a81bc8e9d9db780bf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/zofisig.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/lexukipirefuxejekinawewas.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/somaperub.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d8.bin
b71eefb75e73db96acc43b663aa867aa2d41fe51399867b41c658b828c1f3a5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D8 5044 bytes
font_01_sfnt_off000085d7.bin
27c9a1349ef6b8a35de20c64f8b67e12891cda1980086464bc7135941e1978bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 14788 bytes
font_02_sfnt_off0000b29c.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0xB29C 16092 bytes
font_03_sfnt_off0000c763.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xC763 4324 bytes