Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bd6f5ea158ba14…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 10:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41ea173f9a6a22d2f57e0e78daf01fad SHA-1: bb25e2663e04393c40321c7136dcc89f2051fb1c SHA-256: 43bd6f5ea158ba14b8838dc59f3ecb11fb1e39df0da59cfaccc8b431e4ca62cc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=classical+conditioning+practice+problems+with+answers'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into visiting a malicious site. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are hosted on Shopify. The primary malicious IOC is the ttraff.ru redirector.

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/pify?keyword=classical+conditioning+practice+problems+with+answers
    • http://files.beechwoodtollers.com/uploads/1/3/1/3/131384771/xubatapagikit-gorivalivuxa-favupufudoja-gokipivesusavul.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/1998_jeep_cherokee_owners_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/dibogowesewaremovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5013/0846/files/repotofofufifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/32534928692.pdf
    • https://cdn.shopify.com/s/files/1/0429/0723/8567/files/75240115098.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8167/files/ledimexijifunusemomasog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/iphigenia_at_aulis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/mavejubo.pdf
    • https://cdn.shopify.com/s/files/1/0453/6067/7019/files/wixovuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/megulowituxukewes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/reflection_mulan_violin_sheet_music.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_off00005dc1.bin
4d4313365ba6bbf051d2233d2878adbaebaf55cb32a05c7354d854bfcc95202f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 5532 bytes
font_01_sfnt_off00007062.bin
88d840eea66f631bd841bbc6b892c6e7b2a3f3ca0302767e413c8fe342677603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 9788 bytes
font_02_sfnt_off000091dd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 4324 bytes

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