Malicious PDF — malware analysis report

Static analysis result for SHA-256 87df0c5715f17356…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 09:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c0ff6e01e21a6cc27597da40673ab43 SHA-1: 3518b404f9d211ae898a0221fbfaa25478e4cb49 SHA-256: 87df0c5715f1735624526a17dec2ef98fac2c4349c63c739913d0e88d8e6bf51
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=the+lay+of+the+werewolf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0446/8441/1033/files/mepamomurazosajelelu.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting a social engineering attempt to direct users to malicious infrastructure.

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/wix?keyword=the+lay+of+the+werewolf
    • https://cdn.shopify.com/s/files/1/0446/8441/1033/files/mepamomurazosajelelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7050/4608/files/shankarachi_aarti_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/kiwujomubowerima.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/fewuwerufexin.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/gangsta_s_paradise_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/rejiniboxamawom.pdf
    • https://static.usrfiles.com/ugd/dc51bb_496d5f35b1bd40e3901ca128bd166f45.pdf
    • https://static.usrfiles.com/ugd/b8c837_81582dceab494a0494e83f33b6a962d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b921cfaf69c4d6ab3c0c9fec767e3f7.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/brios_fair_oaks.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/mastering_apache_solr_7._x_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/preparing_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/tofavujogetinerono.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_off00006c73.bin
8d9783bc6deac386c3f6c775f72b233ccb7cb158ad4f20a354c22c2205eaae75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 4820 bytes
font_01_sfnt_off00007cea.bin
b02cfde3a1ad65bb37bfd1601e379fe0cc833ab00020d874aa83262a4f23159b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 8856 bytes

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