Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a475bdfc2c211c8…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 10:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 455f5ccf712e244d0650d4bd1a83f0d9 SHA-1: fd1a7d80c81c2fe3efea926b89bf7e778ccaf47e SHA-256: 1a475bdfc2c211c8a7cad4e5d315fb40081d4e7dabc5f389a7b3ca2dfe1ecdb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised with a keyword related to educational content. It also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The presence of a visible LOLBin command execution instruction suggests an attempt to execute further malicious code or scripts. The primary attack pattern involves luring the user to click the malicious link, likely to download a second-stage payload.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.cc/pify?keyword=percentage+increase+and+decrease+word+problems+pdf
    • http://files.veeralohiniva.com/uploads/1/3/2/6/132696274/jugubajexutuzi-javulurovivel.pdf
    • http://womasinuv.forumbooksshop.com/uploads/1/3/0/8/130813821/mizewa.pdf
    • http://files.sittingtreefarm.com/uploads/1/3/1/4/131407918/773866.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/4907394047.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/3218171761.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0788/files/37992213384.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/41905205242.pdf
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/best_reader_software_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/83440553657.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1167/files/60063817668.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/how_to_usb_bootable_cmd.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/51378471528.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0793/files/folifujamasomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/61201337064.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/pirusowuluzazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/wakejunuvifipabi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/gt_xpress_101.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/thyroid_disease_during_pregnancy_guidelines.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_off00007006.bin
12f4920bd0293cd52f2a7bb6f095014c9f8244d79b01b06ddf1412fffebeea21
pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 5708 bytes
font_01_sfnt_off00008371.bin
d6451934a3e2f65dc14ec0105b67f5f79a7af5dc4ce72b7d653557b029e433ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x8371 10800 bytes