Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c29484315c0c7ba…

MALICIOUS

PDF

58.2 KB Created: 2020-09-06 08:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ff1803cc07ff3acc067625ecedb2a28 SHA-1: 00564c908964fa0cf0e2defe6f7255ba15993f73 SHA-256: 1c29484315c0c7ba1b2c3ace0f9467c7d121fd987c079734bbf8e1fe1ececbb8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=njatc+blended+learning+answer+key'. This URL is presented within the document body, disguised as an answer key. The file also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely to improve search engine ranking and distribute malicious content. No scripts were extracted from this sample.

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.me/wix?keyword=njatc+blended+learning+answer+key
    • https://static.usrfiles.com/ugd/dc98cc_1e9067d8ac04480dbff00076fac389c8.pdf
    • https://static.usrfiles.com/ugd/96bf9d_fe30db1cc1d54db4a54bef278ffb0b3b.pdf
    • https://static.usrfiles.com/ugd/08e331_2386a01b7bd94b6599020edcb2755a79.pdf
    • https://static.usrfiles.com/ugd/b8c837_3717f03d7bd4464691cb01ea4669825d.pdf
    • https://static.usrfiles.com/ugd/3aee12_8d065df8231e40a7839aca1bbb4fab46.pdf
    • https://static.usrfiles.com/ugd/d2751c_3e20133811ff4a289dee5e895f1992ff.pdf
    • https://static.usrfiles.com/ugd/a640e9_6d2796d6928341a6ba617f459d190685.pdf
    • https://static.usrfiles.com/ugd/b97cba_f9952a551eaa47a7995ed224ee0705cc.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/90352178449.pdf
    • https://cdn.shopify.com/s/files/1/0437/8257/0136/files/rearrange_words_in_a_sentence_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/beowulf_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/zasugejubepalo.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_off0000a510.bin
eba304f0858f1935f4f257739d26b1582775a607c9743fd1693c99dee19843ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA510 5552 bytes
font_01_sfnt_off0000b817.bin
8d38b784665e094079b6b9cc5938f842e716973dd52db9cc7208951509b38096		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB817 10448 bytes

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