Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de9743657fd6b32…

MALICIOUS

PDF

37.7 KB Created: 2020-08-03 03:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e0b6890607fb1921cd27fde903965d8 SHA-1: b200c8906a1b475612274f63ed03647b57b2339e SHA-256: 8de9743657fd6b320d21eaf461b526b95770a05e9882a6c23a307b4a5a24ccc8
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=hl+2280dw+drivers'. This URL is presented within the document body, disguised as a printer driver download. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, tricking the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=hl+2280dw+drivers
    • http://files.tickittyshake.com/uploads/1/3/1/4/131405977/1118998.pdf
    • http://losejam.mrhillsscience.com/uploads/1/3/1/4/131437778/4201513.pdf
    • http://files.kangatrainingcaboolture.com/uploads/1/3/0/7/130775387/zivoduvepiwigil.pdf
    • http://files.gjonesgenealogy.com/uploads/1/3/0/7/130775375/waverewoxuz_xamoziv_favamavil_ruwelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/sibun.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1587/files/53796396173.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/1068944048.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7003/files/heroku_delete_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7333/files/26915790993.pdf
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/84809228739.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/40091671883.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/blank_multiplication_chart.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/86168613637.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/64262950603.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/sigirodivinupusupefoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/mujojusuwogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/pibizeja.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_off00005645.bin
0b39ef37d23a3d101c80d9d674ed0539f936a1c463ed6733ee836f2b8342378e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5645 5188 bytes
font_01_sfnt_off00006813.bin
3886193f7d4f4a2d6b1a1b3e2e2a420bc9d166bb42d1c030b648ebb989395581
pdf-font-stream PDF embedded font (sfnt) at offset 0x6813 9948 bytes