Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda745f528bbd5bd…

MALICIOUS

PDF

52.9 KB Created: 2020-08-31 17:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5823aeb0b7dbf8e1a0138b6312d9eb6d SHA-1: b53079157b62775d0931bc7774e4dfa4fcade452 SHA-256: bda745f528bbd5bd00ff0205aa28c2a57f4edba7b88d616f8e2ad10a9309a5fa
136 Risk Score

Malware Insights

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

The PDF file contains embedded links, with one specifically identified as a malicious redirector. The document body and heuristics indicate a lure using urgency and a download button to entice users to click the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits. The presence of numerous benign-looking PDF links hosted on Shopify suggests a link farm technique to obscure the malicious destination.

Heuristics 5

  • 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
  • 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.cc/wix?keyword=biharmasti.+in+dj+2018
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/viper_7345v_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/biografia_de_aristoteles.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/71901683594.pdf
    • https://static.usrfiles.com/ugd/b8c837_25894b92031a4790b9892c38ec72715c.pdf
    • https://cdn.shopify.com/s/files/1/0431/1285/7754/files/virtual_earth_worm_dissection.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/formal_charge_of_azide_ion.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/papegatagamux.pdf
    • https://cdn.shopify.com/s/files/1/0462/5160/6167/files/arcon_bold_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/46520426181.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/limijejexuzozokew.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/mathematics_for_economics_and_business_8th.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_off00006049.bin
1bb4dc2b150f9d0674fe1594ab319881ab23cdbf727356d9aec816bf4b962ac2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6049 5272 bytes
font_01_sfnt_off000071fc.bin
c48b0c19645b18669741ff65d8a281f45caa7deb77c06911f109e8a3af8aafe3
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FC 15756 bytes
font_02_sfnt_off0000a2d6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D6 4324 bytes
font_03_sfnt_off0000b0d5.bin
d7661276120c6d035838bfa7cbfc8e0f80c46b6868979cc4669d9f369f271150
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D5 6192 bytes