Malicious PDF — malware analysis report

Static analysis result for SHA-256 5927e41ab74cdbbb…

MALICIOUS

PDF

40.9 KB Created: 2020-08-22 14:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55f597a6b0569f6fc0af443697dfb3ff SHA-1: 046cd078cc268de713265c973d34710ab588e5d6 SHA-256: 5927e41ab74cdbbb1b13ba90967913c2135365867fb3a5fb5c308db9fe1697a4
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the title 'Guidelines of sebi for primary market' and references urgency, suggesting a lure to trick users into clicking the malicious links. The primary malicious IOC is the redirector URL.

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.
  • 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
  • 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=guidelines+of+sebi+for+primary+market
    • http://gebava.earltoddbbq.com/uploads/1/3/0/7/130739415/pujogozulijova_godegajateka_dimewika_tajidofafe.pdf
    • http://furagi.jennifercass.com/uploads/1/3/1/8/131857419/zavipajuwemip.pdf
    • http://files.georgiarugbyunion.org/uploads/1/3/1/3/131381772/kufoji.pdf
    • http://files.jumaephotostudio.com/uploads/1/3/1/4/131437311/bixogaxix-bilip-sutarezup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/gisaworazewabufo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/23076051502.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/43118594900.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/united_airlines_gate_information_sfo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/37658142889.pdf
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/sibezubivogunozojodupafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/dideguxuporivosiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/79915870077.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/76412406541.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/wasteland_survival_guide_fallout_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/pelip.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_off00006130.bin
4ff5b09de9492dfb4836fb0e73f627f775f8c424572879ac4651ab97bc208105
pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 5524 bytes
font_01_sfnt_off000073e0.bin
91bd19e2161247f57b522416b458a966039892e884715b8adeeb77bd5c75a26d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E0 10168 bytes