Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b1bc04174d6c74…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 23:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25db12e80e652fbe59c926bf166d5d63 SHA-1: 6c785e15775700c1894b7324e87080b402c945ed SHA-256: 52b1bc04174d6c742d6b531402488f14380db9e1f63b5c6073992937548bdaa5
130 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, masquerading as a download for a song. This is further supported by heuristics indicating a malicious redirector and a link farm designed to distribute malicious PDFs. The document body, though heavily obfuscated, contains text related to a song and the PDF creation tool, suggesting a lure to entice clicks.

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.com/pify?keyword=ambareesha+kannada+song+free
    • http://files.zemskovdanceacademy.com/uploads/1/3/0/7/130775063/raxawux.pdf
    • http://files.themuddybearcat.com/uploads/1/3/0/7/130739533/4856194.pdf
    • http://zotanagib.grinerdrillingservice.com/uploads/1/3/0/8/130874422/3252138.pdf
    • http://warug.cphsvirtualmuseum.com/uploads/1/3/1/4/131452883/vavurabomapitigizuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/xasujatidudaxorum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/28397911339.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/phylum_chordata_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/36373233474.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/gotivofuvadededolopet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/bawiwamewegoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/stepped_footing.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/busitivanapomuxibopawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/39617042257.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/xefodub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/fatibulebunuweguk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1736/files/65415582864.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_off00006cac.bin
3dc4b33155bc17759e72990ba5c599ea591b882550d7f7c1530e66d24d622a71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 5484 bytes
font_01_sfnt_off00007f25.bin
5614eb5692c23b66757d9b79fdf97cddc14b11112b2377cda53f202e58ffc79c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 10124 bytes