Malicious PDF — malware analysis report

Static analysis result for SHA-256 278aac4afc5441df…

MALICIOUS

PDF

50.6 KB Created: 2020-08-11 15:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a60a926226e68ea004b9bbd2d8384cf4 SHA-1: 2118a15220d104523b0ace62d82359ab6f948deb SHA-256: 278aac4afc5441df2a95a9efd37d9b4ca3aa0301e9b27939b815067a55c83e24
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=gallstones+treatment+pdf', which is flagged as malicious. The presence of a link farm and a malicious redirector suggests an attempt to lure users to potentially harmful content or exploit kits.

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=gallstones+treatment+pdf
    • http://tatufu.catesimpsoncounselling.com/uploads/1/3/0/7/130740178/8239297.pdf
    • http://files.recordboxtruck.com/uploads/1/3/2/7/132740412/4892322.pdf
    • http://files.leewestproperty.com/uploads/1/3/2/3/132302926/935565.pdf
    • http://files.nicole-florio.com/uploads/1/3/0/7/130738970/9134309.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/jifaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9497/files/33880265377.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/58939760513.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96258555683.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/85969211397.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/65270327538.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/folaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/81085793466.pdf
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/polaroid_stories_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/joxoxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/maxuxulego.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/rimoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/zofowukifewigo.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_off0000887d.bin
af2986457fe30ab52a1b9b5730865d0acfb2cfa138c37e1aed93b45e2b4a93bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x887D 5220 bytes
font_01_sfnt_off00009a29.bin
f80fde707f3b7b98a6ef87ef1244176febe27d6c538ddac483f5d41f0fb231f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A29 10376 bytes