Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08a35a8d3b14e6c…

MALICIOUS

PDF

64.3 KB Created: 2020-08-15 05:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 040598bb76273611b94dad9bcb389a69 SHA-1: 7d08c7e35e97d4f96fa19691fc1c7266da9cca03 SHA-256: a08a35a8d3b14e6cb428df776a589faad99730d4ef8fbf5bee3644728cff3697
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of a malicious redirector link and the sheer volume of links indicate a link farm or phishing attempt.

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.com/pify?keyword=web+browser+webview+android+studio
    • http://files.valiulis.com/uploads/1/3/1/3/131380000/pexewuvevebun.pdf
    • http://bodoxage.ortingvalleyfarmersmarket.com/uploads/1/3/1/4/131452972/pezinobisegadikebobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/jaxogokakinedib.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/33089186164.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/81619719093.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/91692502413.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/6923621242.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/ralaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/norozevadaniwixomurumafit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/64294050689.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/3523577556.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_off0000b67f.bin
1c72ae2208bfce6b1403413ebdf37d456b097f7e391829b44824c16d43c5e20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB67F 5092 bytes
font_01_sfnt_off0000c7f7.bin
27f5c9b69047e160a4322aaad3e9eb71541bcfa19e04a8fefd2d3ff3a7d19c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F7 13968 bytes

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