Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fdaaabd3afb2f6…

MALICIOUS

PDF

60.3 KB Created: 2020-07-31 15:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 860cba4a852873729660d4f4f7b76173 SHA-1: e955a99dbc4cdd1c6d0beb5a2ee38be24b9683d5 SHA-256: 20fdaaabd3afb2f6f0729bcc1a24865fee9ccb8a712c182573313e9151780dd0
120 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. One critical heuristic identified a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, appears to contain text related to software installation, suggesting a lure to trick users into clicking the malicious links.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=install+yarn+on+mac
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdf
    • http://files.wintergreenchurch.com/uploads/1/3/1/3/131383329/1240953.pdf
    • http://files.yourselfservices.com/uploads/1/3/2/8/132814306/d4268.pdf
    • http://files.mountdoraenvironment.org/uploads/1/3/1/4/131408954/zaxej_nadoruton.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2716/files/kuvivufakibasukenunizof.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/48772536602.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/danebinarilalirafaguvun.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/80639125214.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/lidatuwolexofuxiwevix.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/purisitovuvugobuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/87990609517.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/dutij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/medazajotorojigixerujive.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/70951591165.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/sodefafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/gutachtenstil_jura.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/87826324879.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000988b.bin
eca7e7072c8777cebb995c0660ec9ffaac965dfbaa4e80ba737713b438d2ef8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 4604 bytes
font_01_sfnt_off0000a7f3.bin
e2e67d64de4a63daa25e5773bd7f41fc6f425deddb3ba2b1123ea88336104949
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F3 3296 bytes
font_02_sfnt_off0000b4e2.bin
546eafedab0885007435ceba4f18e3a72b42add3e421ba244a28105603e9b615
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E2 14732 bytes