Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d23815d51707b2…

MALICIOUS

PDF

51.0 KB Created: 2020-08-30 17:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88315234ee9bdddba2cdd3b7586efb9d SHA-1: 38e5dbe309b2464687de7e0e3abaecfcad2dcbfb SHA-256: 39d23815d51707b262b72671cde159e5b1b2460587045b7901dd1d3f7e2f8bfc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDF files, indicating a link farm. One of the primary links directs to a known malicious redirector. The document body is heavily obfuscated but contains references to the malicious URL and several benign-looking Shopify URLs, suggesting an attempt to disguise the malicious intent. The primary attack pattern appears to be the distribution of malicious content or SEO manipulation through a link farm.

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/wix?keyword=proceso+de+investigacion+documental
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/xonatanutijon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9561/files/zumutudotud.pdf
    • https://cdn.shopify.com/s/files/1/0444/4664/6439/files/putifiwapojaxode.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/11996065298.pdf
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/community_certificate_online_print.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/annotate_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/duvubukiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5325/1751/files/soweligi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/82301526364.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/gimimisoxixileponalowilar.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/chemistry_sample_paper_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/kewosuwakagimowolakita.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/86223382058.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0963/files/nasipivokobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/12v_100ah_battery_charger_circuit_pd.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_off0000719e.bin
f2b076c7d0c5fa393d6f3758985931b917347f2dbc504a018be8a4a05aed1fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x719E 5320 bytes
font_01_sfnt_off0000839b.bin
54a9dd889834fe23add11be90bbd9f0ce3c34fb4aa7c37ed0552186b79ba7768
pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 11160 bytes
font_02_sfnt_off0000a806.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA806 16204 bytes