Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bdd47cc0382ea6…

MALICIOUS

PDF

45.8 KB Created: 2020-07-21 09:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71121dd347043748ac33090347b7cf27 SHA-1: 1650bb96bb165e615fa36e66f959a4bbe0c1cdc3 SHA-256: 58bdd47cc0382ea6f573c50a4cb633c9fd8373c2588d002bde6aa7feda066a2f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The presence of a 'download button' heuristic and the document body text mentioning 'Bmp to pdf conversion online' suggests a social engineering lure. The primary malicious IOC is the redirector URL, which is likely used to funnel users to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=bmp%20to%20pdf%20conversion%20online
    • http://files.obbagyconsulting.com/uploads/1/3/1/1/131164488/bafigi.pdf
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • http://files.downtownenidhistory.com/uploads/1/3/0/7/130776081/3348842.pdf
    • http://files.texasconex.com/uploads/1/3/1/3/131378899/91823d9ba9.pdf
    • http://files.pcconfections.com/uploads/1/3/0/7/130775619/taveleba_misup_xosagasovul.pdf
    • http://files.texasconex.com/uploads/1/3/1/3/
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/41424574596.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/62011320210.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/35039578614.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/tawigoja.pdf
    • https://refifiv.files.wordpress.com/2020/07/sujusunarit.pdf
    • https://detekekud.files.wordpress.com/2020/07/32179611234.pdf
    • https://juderoxer.files.wordpress.com/2020/06/kiniboruvudokokireg.pdf
    • https://dulikowisu.files.wordpress.com/2020/07/pukonuboligidojizalevake.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/95754679806.pdf
    • https://cdn.shopify.com/s/files/1/0438/4381/3538/files/23869779890.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/45878314924.pdf
    • https://cdn.shopify.com/s/files/1/0432/7184/8100/files/26519683353.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/84108031378.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/14569512391.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/vofofukibusizido.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_off0000758d.bin
c863ae57b0603594bce84f6d4244a99b39acc0fb8cacdb71728bed13cdab91a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 4988 bytes
font_01_sfnt_off0000866f.bin
0807706382dd6cfe5e2e5762e7eeeb0ee4ba94e6bcbe327b6fa47f05c3876157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 10308 bytes

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