Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94f90a06d633098…

MALICIOUS

PDF

49.9 KB Created: 2020-08-03 10:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0936e838e3db0faa2299bc522bc1ddfc SHA-1: 01d59cbd0d055b0cad47e6ab0a19092cd184ae95 SHA-256: c94f90a06d6330985787480012df9caf89ffadf44afc825eba6692735b22f4ef
128 Risk Score

Malware Insights

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

The PDF contains numerous links, a common tactic for SEO spam or redirecting users to malicious sites. One prominent link, disguised as a Samsung manual, leads to a known malicious redirector. The PDF also contains a large number of links to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content.

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.ru/pify?keyword=samsung+sm-+t800+manual
    • http://files.bornofsinpits.com/uploads/1/3/1/0/131069781/5a6f6ff8344b31.pdf
    • http://files.alicelynn.com/uploads/1/3/0/7/130775544/7487438.pdf
    • http://files.getbacktobusinessquickly.com/uploads/1/3/0/7/130776225/3fe8de408a.pdf
    • http://files.lifeontherockinternational.com/uploads/1/3/1/3/131398504/zosaditojabamefap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/gatesixuxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3792/files/9091861911.pdf
    • https://cdn.shopify.com/s/files/1/0435/8458/5883/files/principles_of_macroeconomics_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1265/files/63072444544.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/jigutunuziv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/unfollow_on_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibuzos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/42168223730.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/tolori.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/circuits_ulaby_2nd_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/63106721535.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/vufefojuwivaxedar.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_off00006cb3.bin
b445c3180755f9a0be4f923e460d77b766bc4a807118cf8c3cf3cabaca4ee39b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB3 4988 bytes
font_01_sfnt_off00007d85.bin
b57c8b5971ad03b5af0a1bb4116fe3347614f8cb48b1c1a67cb50d77f96e73da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 15280 bytes
font_02_sfnt_off0000ac36.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC36 4324 bytes