Malicious PDF — malware analysis report

Static analysis result for SHA-256 406465a8d5960cca…

MALICIOUS

PDF

42.9 KB Created: 2020-08-16 18:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b9b68edf9d4e9b02c83a42a4a3887a7 SHA-1: 647886de120710ebc5258ddef41183422b8220c6 SHA-256: 406465a8d5960cca476f8b43fb9ad4688bc6d1cdeb1dea9f83229aa5bf2c20b8
128 Risk Score

Malware Insights

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

The PDF document contains a lure for "Aiou solved assignment free" and includes a significant number of embedded links. One critical heuristic indicates that these links point to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=aiou+solved+assignment+free`. Another heuristic identifies a PDF link farm, with many links pointing to Shopify domains, but the primary malicious redirector is the most concerning IOC. The document body itself is heavily obfuscated and contains the malicious redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aiou+solved+assignment+free
    • http://files.thedevilinthegrape.com/uploads/1/3/0/7/130740521/dovisikite.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/gapanisuweropubasiparogev.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/tefirusozuxenabit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/98217401073.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/50935764776.pdf
    • https://cdn.shopify.com/s/files/1/0436/1073/4755/files/critical_capabilities_for_business_intelligence_and_analytics_platforms.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/25482665136.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/baldur_s_gate_2_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/31112051055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/44397599330.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/opengl_programming_guide_9th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4650/files/83461641763.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/localization_strategy_in_international_business.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_off00006a55.bin
0e7794dce66b5c26041b2af2e90d4b5631cf2fc5c86690fd05b256e1b33b3d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 5276 bytes
font_01_sfnt_off00007c35.bin
a29c49f904f02d89150e0ab86215afee1f76fe3edee759a4a5868ab5aaee5aef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 10228 bytes