Malicious PDF — malware analysis report

Static analysis result for SHA-256 a589cd125dd96cfe…

MALICIOUS

PDF

41.5 KB Created: 2020-09-07 17:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ddf64158e560bbcfdd73f2cbac7e22a SHA-1: d79102289b903fe154ae695f25f89d0383d9582c SHA-256: a589cd125dd96cfe6a4109c042b15bbca73bbed6b2e2d33526055518f5a21618
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign content farms, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'realize reader answers'. The presence of a malicious redirector suggests an attempt to lead the user to a phishing or malware distribution site.

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.link/wix?keyword=realize+reader+answers
    • https://www.pearsonr
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/fraction_decimal_to_percent_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3088/9126/files/20959506452.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/2080433496.pdf
    • https://cdn.shopify.com/s/files/1/0435/2851/9832/files/biochemistry_satyanarayana_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/new_destination_b1.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/63519541878.pdf
    • https://static.usrfiles.com/ugd/97634b_f94dbe97d2934831aff8e9d9022bded6.pdf
    • https://static.usrfiles.com/ugd/6cf804_b6799613c4ea4b799a6911147f186ec9.pdf
    • https://static.usrfiles.com/ugd/6d59ab_b4f8f0c9f2314a6688894f2fef11442b.pdf
    • https://static.usrfiles.com/ugd/3e7897_3b1320e3c47a4d24a1de26f8fb1aaf83.pdf
    • https://static.usrfiles.com/ugd/1f6d71_526b88d0e26344689edbfca59d7b177f.pdf
    • https://static.usrfiles.com/ugd/9c58c5_684910961c6d482d8c2a8d7e4b1d25bb.pdf
    • https://static.usrfiles.com/ugd/8acad3_78b1136ee7f744eeb3833cd8a5f75d44.pdf
    • https://static.usrfiles.com/ugd/bdc04d_ecb334206e5d4e3a8cd77947842ec77c.pdf
    • https://static.usrfiles.com/ugd/866690_c2e27da75d2b4d369f4433bff08f537d.pdf
    • https://static.usrfiles.com/ugd/f35da0_4582cc11f2624af785ef7cdb1dfa2a88.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_off0000623a.bin
a1eb40e2dc22248256c875211466f8bf6c0141addbacd449d2c48e819cc828a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 4968 bytes
font_01_sfnt_off00007348.bin
53a8bc0c543088bd2634bc82063316e67640b64ae5a9bee6f9b0f8e56f186de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 11656 bytes

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