Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff19095999225c08…

MALICIOUS

PDF

46.4 KB Created: 2020-08-23 14:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf4ef422b2dbd65af09ba67f728ada8 SHA-1: c9737f843d9d2db87b17a393f56222aeaacbcf52 SHA-256: ff19095999225c08e2665c76ca0d092b301e22c3d1d06871a0957902e1a317d9
160 Risk Score

Malware Insights

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

The PDF document contains a social engineering lure, presenting itself as interview questions to trick the user into clicking a link. This link, 'https://ttraff.cc/pify?keyword=mpls+vpn+interview+questions+and+answers', redirects to known malicious infrastructure. The document also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious content. The heuristic 'SE_BROWSER_INSTALL_LURE' further supports the social engineering aspect.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=mpls+vpn+interview+questions+and+answers
    • http://jetunax.calaverasarts.org/uploads/1/3/2/7/132741100/3500105.pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • http://files.cowgirlastrologer.com/uploads/1/3/1/4/131406893/07146de51.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/41618886023.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/wowupunuludupimufan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4330/files/consumer_awareness_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/madavarodigeniwem.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/definitions_of_accounting_terms.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/mitekexonok.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/periodic_table_elements_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/4768/1191/files/pufaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/carmilla_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/19871262715.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2342/files/app_addict_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/gigemumibutawesuwafez.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_off00007793.bin
3dda0cd696af6649d008dffeed1e097beeff699bc3a3ee4b27a39d60ebeda8ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 5236 bytes
font_01_sfnt_off00008984.bin
e6d7894f9dfe37c5a5a4f2d208c48c8c3bd54d55811a35c4c6a37438d943774f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 10356 bytes