Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bed2e7b1b88f71…

MALICIOUS

PDF

41.3 KB Created: 2020-08-12 21:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47ccaecb3c648462a698c3103c0d85ad SHA-1: c9eb70201930e40234b07f36130643bd8ac16dc6 SHA-256: 57bed2e7b1b88f71abafa4b59d07f323030e8b673055bb4de529eb8182678de8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a PDF redirector link to ttraff.ru, which is known malicious infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. The primary intent appears to be directing users to malicious sites through a deceptive link farm strategy.

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/wb?keyword=interface%20program%20in%20java%20pdf
    • http://files.bryaneconnellpsych.com/uploads/1/3/1/1/131164425/kipamagiwizigi.pdf
    • http://kujadoke.ballboss-stories.com/uploads/1/3/1/3/131378780/5974527.pdf
    • http://files.ummta.org/uploads/1/3/2/7/132740361/2182c402f9a5.pdf
    • http://files.markbellusci.com/uploads/1/3/1/0/131070291/3920102.pdf
    • http://files.positiveposturenz.com/uploads/1/3/1/4/131483550/sivaf_polatafi_zuwovil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/xemobabojifemozi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/95500682213.pdf
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/97061666192.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/22557034239.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/7518132605.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/61861631839.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/revejamunoravewovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/kuduregasurez.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/64934700656.pdf
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/zabokewigabuvomaradenes.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/difference_between_budgeting_and_forecasting.pdf
    • https://cdn.shopify.com/s/files/1/0432/8728/1832/files/jekozuvipoxoze.pdf
    • https://cdn.shopify.com/s/files/1/0437/3194/3585/files/lonuso.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_off00005aa8.bin
0107c2766c94efee4baf34026e4d3c242d6dc7d11dda41b6e272120987cfd7fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA8 5340 bytes
font_01_sfnt_off00006cbb.bin
6ed7c599a864bfd1cf23cc10851bb201316b9b50f3aa7c4f18ba0188c150c6e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 13700 bytes