Malicious PDF — malware analysis report

Static analysis result for SHA-256 37badde16a395b0f…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 22:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1cdd6ba5a271aec978515c18967a48 SHA-1: c6ab84a9e85ad5ba6bbbd26bceb69a6c3a6f4f2e SHA-256: 37badde16a395b0f7bcb566965bf358a84d158aa20e038765ae58094bfe27d1b
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links redirects to a malicious URL via a pify service, likely to deliver a secondary payload. The document body, though partially corrupted, suggests a lure related to a 'Harbor breeze ceiling fan installation manual', combined with urgency language, to trick users into clicking the malicious link.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=harbor+breeze+ceiling+fan+installation+manual
    • http://wevupusa.vietpro.network/uploads/1/3/1/6/131606490/xumojipi_ruwunakavevu.pdf
    • http://files.d4rkvision.com/uploads/1/3/2/7/132740413/lofab.pdf
    • http://files.janaina-vieira-marques.com/uploads/1/3/1/8/131856121/fujuvireto.pdf
    • http://gakenu.yfbf.org/uploads/1/3/0/8/130873851/78a1f8a76b00cf6.pdf
    • http://files.ambitoinmobiliarioltda.com/uploads/1/3/0/7/130775063/778f8aaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/buzekeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/michigan_state_abbreviation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/xowufatenaxijir.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/55143735028.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/7_day_forecast_destin_fl.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/don_t_starve_glommer.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/jexumorogegagevitekuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/zaxemawivew.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/pomepa.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_off0000638c.bin
75ba70663edbf79714ea5e908e82dfab22bd8498634f6f4db8d603dbc448a595
pdf-font-stream PDF embedded font (sfnt) at offset 0x638C 5352 bytes
font_01_sfnt_off000075b2.bin
8708ae4f754ef42589f4f52478dd15520e924df118edd56b1ef7139d84efb152
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 10072 bytes