Malicious PDF — malware analysis report

Static analysis result for SHA-256 e428e332509409ef…

MALICIOUS

PDF

42.3 KB Created: 2020-09-05 13:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bfcc8f5319d0bc345261e9af906ed32 SHA-1: 8ba96d23c7b4bbc9d7132ca7f519d1eacdb0bef8 SHA-256: e428e332509409ef539eff69996a28eaf3fdce626f3c431d30ca24b810e59f66
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link leading to a known malicious redirector. The document body, though heavily corrupted, contains text suggesting a lure related to a 'Valve technician resume pdf'. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload or phish for credentials.

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.club/wix?keyword=valve+technician+resume+pdf
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/mamevopepofulupedibexudel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/anacardium_excelsum.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/darth_vader_theme_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/ielts_writing_task_2_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/xixilekutezidozuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/suzunowaxixifegesak.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/mopigevanumara.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/rurotafedetorizodej.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/notificationcompat_does_not_exist_android_studio.pdf
    • https://static.usrfiles.com/ugd/b8c837_fde285ca2f0545b58b282b894a371ec7.pdf
    • https://static.usrfiles.com/ugd/b13fd1_42d262e700ea4913bf74534aa0129289.pdf
    • https://static.usrfiles.com/ugd/739437_c741e44bedd3484f8c44a5159adc55ec.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_off00006014.bin
38b40dcc9058ef209b9d06f3e1e3c6ec98762ea9a8a2fed89d427d7fa2faae92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5420 bytes
font_01_sfnt_off00007261.bin
689ab1277495d3ac3c8480372b81ebaac387a991484ba832df30b487dc8688a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7261 13552 bytes

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