Malicious PDF — malware analysis report

Static analysis result for SHA-256 4484bdb6d9cc4c29…

MALICIOUS

PDF

39.8 KB Created: 2020-09-06 13:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a4a778f4797461c4201bc3b0d64fc35 SHA-1: 528bbe7ed5963ac52d1e77475ceb126e75020b67 SHA-256: 4484bdb6d9cc4c29745d8dc6fcb278a2fb487a31461869b5ed3a8886439566e2
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 a URL that appears to be a lure for a business template. The document body also contains this URL, suggesting an attempt to trick the user into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. The file itself is generated by wkhtmltopdf, a tool often used to create PDF documents from web content, which can be abused for malicious purposes.

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=business+canvas+model+powerpoint+template
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/juvifezog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/agnyaathavaasi_movie_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/jojufekizipofunujaserip.pdf
    • https://cdn.shopify.com/s/files/1/0460/7885/3284/files/vizopobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/hallelujah_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5735/files/river_basin_management.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/guziwuzupikadididep.pdf
    • https://cdn.shopify.com/s/files/1/0440/5847/6694/files/add_more_modifiers_tinkers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/29004701524.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/gutujojuguti.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/pekogavuwazokudumaworomuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4274/1143/files/2nd_puc_biology_ncert_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/turixibobunaximalakopireb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/19379786183.pdf
    • https://cdn.shopify.com/s/files/1/0431/3458/2938/files/ligixanajufusebeketasif.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0152/files/air_on_a_g_string_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/look_of_disapproval.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/sibobuwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/xorumafemomijoxakivajo.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_off00005f8a.bin
97ee771fa0e59040f8bec2eef330e158b0f7aab5e394b493e78d728c39e6e8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 5420 bytes
font_01_sfnt_off000071fa.bin
3b4cbc191d95268be11a760558898572af8775655284aa06bd7714e377f5d1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 9372 bytes