Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dd84b31ae205c9…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 17:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68166955309391508100dbb889f85992 SHA-1: 8a37dace108f1783d7a741598262b49e01b278df SHA-256: 38dd84b31ae205c900497741427783d3fd09df80c662687c55aef4293e80b0ea
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.ru/pify?keyword=contoh+altruisme+pdf' points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is designed to host a large number of external links, likely to manipulate search engine results or to hide the true malicious destination. The document body contains obfuscated text and references to the redirector URL, reinforcing the malicious intent.

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=contoh+altruisme+pdf
    • http://files.crosswaysholidaycottages.com/uploads/1/3/0/8/130873944/6425368.pdf
    • http://files.johnptacek.com/uploads/1/3/0/9/130969577/welotejo.pdf
    • http://files.justiceforallcanada.org/uploads/1/3/1/3/131381363/mibazama_birefoja_tiboki_zutisopelez.pdf
    • http://files.justiceforallcanada.org/uploads/1/3/1/3/131381363/mi
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/zarunobiledete.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/tamil_christian_songs_status.pdf
    • https://cdn.shopify.com/s/files/1/0439/2747/0235/files/87767612867.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/tifr_question_papers_physics_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/64622033048.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/oxford_bookworms_stage_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/14020884068.pdf
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/59872090609.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/zuturetawukow.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/bash_prompt_for_input.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/segupolunif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/pupuluwogibolupir.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_off00006f29.bin
e1da106f7ca897539bdd9bf1b21149bb243396b06c128084f617d9c92341f0c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F29 5188 bytes
font_01_sfnt_off00008097.bin
4be0675891faff528947b616d8db8ec8f208100a2ccef6a82ae1bcbc49853752
pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 9980 bytes