Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c77a9d6158f683f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 03:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 484f609b30c0793e45177983fdd220c9 SHA-1: 70114a7d6ddef734a7f2d278ca31bde0334d29e6 SHA-256: 9c77a9d6158f683ff56f234d5b41a67aba78b42fd33288ae3a376c257ffbcd96
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 Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure.

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.ru/pify?keyword=accounting+concepts+in+telugu+pdf
    • http://files.jjohnsonartist.com/uploads/1/3/1/6/131606758/202e5c5c96aa2.pdf
    • http://xuvika.lorenasantacruz.com/uploads/1/3/1/3/131383943/3fa74a4.pdf
    • http://files.deanmelbourne.com/uploads/1/3/1/4/131438079/vogenu-madevuvejepisul.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/d_d_descent_into_avernus_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/45004180225.pdf
    • https://cdn.shopify.com/s/files/1/0428/1237/5207/files/midufemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/wenepirega.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/pegowo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/doduzibiliwajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/cyclothymia_dsm_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/sagekogepidugupudesinaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/traditional_and_modern_concept_of_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/free_keto_recipes_australia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84593422723.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/26386060571.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/87176212915.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/melizozitez.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_off000062a6.bin
4feba3ae9ca435259638f24243e1d9ecbb2afc624197f72520620a996296f70d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 4888 bytes
font_01_sfnt_off0000735a.bin
23f8ec7f9ac84db7eac348aadc826e33900afe30b0a10dae092b55a621d914cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 9900 bytes
font_02_sfnt_off0000951a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x951A 4324 bytes