Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaf072a41d22a0e…

MALICIOUS

PDF

50.4 KB Created: 2020-08-08 17:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c76ec93265ae2387371d96732f89f54 SHA-1: 758d2ca90de3bed62dcef403826c8e938bc11eb9 SHA-256: acaf072a41d22a0e4c8c82e3e8e535052cd298a5de20141ce7c75e8891a64aec
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body text is obfuscated but contains the same lesson plan lure as the redirector URL, suggesting a social engineering attempt to drive traffic to malicious sites.

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=detailed+lesson+plan+in+english+5+pdf
    • http://files.shishisalon.net/uploads/1/3/2/7/132712050/5c7883b6c9586.pdf
    • http://files.neilfaulkner.co.uk/uploads/1/3/1/0/131071145/acfa7b4.pdf
    • http://files.longlakechurch.org/uploads/1/3/0/7/130775033/ea3d27f7ce8.pdf
    • http://files.lion-chemical-stores.co.uk/uploads/1/3/1/4/131437363/wenilalikojo-wapavopoka-pafapudo-pokawudap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/gukupikoxil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/tafifinaxatapukulizokik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/73635481095.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/62093172245.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/strategy_business_magazine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/fasevurexupebuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/ninozorusedav.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4417/files/17812132539.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/74850637722.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/blue_iris_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/duxebovo.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_off0000789b.bin
bcbbf6fe7edec38d5b73e627e58a82e0e1ebba94530e04192729cdcdb04b5736
pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 5116 bytes
font_01_sfnt_off00008a05.bin
c8208c13a8bb2f69a3cd71d36b77b52a6ece867c91bea4edf5888d6fb2d5a4bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 10484 bytes
font_02_sfnt_off0000adef.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xADEF 4324 bytes