Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd356c6a655e87a3…

MALICIOUS

PDF

76.0 KB Created: 2020-08-12 05:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a83b99eb84f47f3849570d741dd53b2 SHA-1: d883c9773d15cc53b726bbc6ab492bfb62ad6599 SHA-256: cd356c6a655e87a3f3014b1654cfcc080684a045183f9c8556878c29499ca6f9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector at 'https://ttraff.ru/wb?keyword=what%20is%20inductive%20reasoning%20pdf'. The document body, though heavily obfuscated, appears to contain the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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/wb?keyword=what%20is%20inductive%20reasoning%20pdf
    • http://files.authorbellabryce.com/uploads/1/3/1/4/131454065/xisivuguwep.pdf
    • http://files.authorrebeccaarogers.com/uploads/1/3/1/6/131637034/wakobobo_jujorufaxeso_puxul.pdf
    • http://rumuka.whoisnecessityschild.com/uploads/1/3/2/6/132695492/xadukuju-rabonado-felapan.pdf
    • http://getim.runningfromanxiety.org/uploads/1/3/1/3/131383548/lojabojow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/hoover_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/gastroenterology_clinical_cases_uncovered.pdf
    • https://cdn.shopify.com/s/files/1/0448/2295/4141/files/cardiopatia_coronaria_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/dutufuwovelekosinurelij.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/takujubelajivonebavemu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6712/7446/files/96284616296.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/94423587607.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/78135981639.pdf
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/zebotigirexa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/wenavumorudukujipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/bowflex_xtreme_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/ar-_15_rifle_builder_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/kemes.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_off0000ec21.bin
80db1aaa3d3997a1d30926fc4ca33cb662c0ea65c2ad05f7b7c2e74105ec9249
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 5460 bytes
font_01_sfnt_off0000feb3.bin
a75d45045b2a57f21d518fcaff01f4a5d74f7761f7ecd004f2ef1286582305c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 10456 bytes