Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c3b627e13a8230…

MALICIOUS

PDF

47.3 KB Created: 2020-08-12 19:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4336d3838120de7737336fd8992f734b SHA-1: 3733b1722573e35557e9b23df48229aa3e878273 SHA-256: 51c3b627e13a82307dfdfead9c79531f535d01361bd3bfa1c77a505dfe3f75b4
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, specifically pointing to 'https://ttraff.com/wb?keyword=non%20mutually%20exclusive%20events%20worksheet%20pdf'. This indicates a social engineering attempt to trick users into clicking the link, likely for a phishing or malware distribution purpose. The document body, though heavily obfuscated, also contains the same URL, reinforcing the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims.

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.com/wb?keyword=non%20mutually%20exclusive%20events%20worksheet%20pdf
    • http://files.highgrundoncottages.com/uploads/1/3/1/8/131871488/2191395.pdf
    • http://luzadetej.nsanys.org/uploads/1/3/1/4/131454526/8346314.pdf
    • http://files.usafortunae.com/uploads/1/3/1/3/131384070/lipelo_padisiduvag_wewemudekufozis_vegowuperev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/maraketovuwozumolede.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/11925170570.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/rimagotutovopekitarudip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/86160364217.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/biologics_in_dermatology.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/articulos_de_alcoholismo_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/69965630389.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/35339183341.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/vidipudizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/69167012545.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/84172304305.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000505f.bin
f4af367ccf6267531cf406065825788e000efd4e4fc5db4a4133a956f673b1f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x505F 5632 bytes
font_01_sfnt_off00006373.bin
01f8c5dbcf2c1397a31cf705c92891e9e6b6fa7638f10f56bc4ffba11d98fc67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6373 12972 bytes
font_02_sfnt_off00008cb7.bin
bbb4928b2c5a50c0832ecd6ebb1362cd2d714bbe3e9ddae61164af3ebb87f482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB7 16112 bytes
font_03_sfnt_off0000a195.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA195 4324 bytes

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