Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21904dcd3d8207a…

MALICIOUS

PDF

50.7 KB Created: 2020-08-13 22:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48ab87b6fb8c3dd8c9be7c0dd955dcf8 SHA-1: 3f8222546a47d2e4994fd5ebdece3c0009492272 SHA-256: d21904dcd3d8207a8565b67dd08cbd40bcaebded9bd96c738b211f1c61a6e305
140 Risk Score

Malware Insights

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

The PDF file contains a prominent link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'Video er app for jio phone' and the malicious URL itself, suggesting a lure for users to download potentially harmful content. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to Shopify domains hosting PDF files, likely as part of a link farm to improve search engine ranking for malicious content. The SE_QR_LURE heuristic suggests a QR code might have been present, further indicating a phishing or social engineering attempt.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.ru/pify?keyword=video+er+app+for+jio+phone
    • http://files.daradrar.com/uploads/1/3/1/3/131379246/6311640c6f30.pdf
    • http://files.shaluksgardensolutions.com/uploads/1/3/0/8/130814042/netudexutu.pdf
    • http://zejisoza.wstprop.com/uploads/1/3/0/8/130874493/menovozasapu-refax-luvef-watulefa.pdf
    • http://files.thundercounseling.org/uploads/1/3/0/7/130775249/1486454.pdf
    • http://files.dipconcaribbean.com/uploads/1/3/0/8/130814411/xulov-lekinosa-betaberijumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/yield_management_books.pdf
    • https://cdn.shopify.com/s/files/1/0443/1613/1484/files/18665981522.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/kekalotizutu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5053/9940/files/revista_de_tecnologia_informatica.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/43345920412.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/forofimusoluma.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/pozexuzuxizuxalaxowopu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1497/9737/files/72128668599.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/26993664843.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d6.bin
26ce35e434b6721f75bf2ea0bc8d85064d6efc86d826db251bb9d1ae10649d39
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 12164 bytes
font_01_sfnt_off00008888.bin
496606d7f22d08ae409ae78ff8f35ae855556341952330fa0014f35314570d76
pdf-font-stream PDF embedded font (sfnt) at offset 0x8888 4960 bytes
font_02_sfnt_off0000996a.bin
174a8811bb9af482c8b9581081857a9a80b9e82bc7787a63374b41777ba2e591
pdf-font-stream PDF embedded font (sfnt) at offset 0x996A 10700 bytes