Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fba2c11bbd0d4a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-01 16:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b8494ebe35a2d9378899e658ab3159 SHA-1: 3c79c23b4b7a9fab082b741be3d965f36e05263b SHA-256: d4fba2c11bbd0d4abbffc3f57a6466d4b82239dd9698b374c0d796773d5247e2
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=hp+pavilion+6000+driver'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, reinforcing the lure of a driver download.

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.cc/pify?keyword=hp+pavilion+6000+driver
    • http://files.bowlsnortheast.com/uploads/1/3/1/8/131856374/tibalabedog.pdf
    • http://files.scarboroughlodge.co.uk/uploads/1/3/0/8/130814115/pusikuv.pdf
    • http://files.pipesplumbing24h.com.au/uploads/1/3/1/3/131380480/nivibusupejitiselogo.pdf
    • http://files.midsomersetmartialarts.com/uploads/1/3/0/9/130969241/gojoludemoxo.pdf
    • http://files.maestrokicks.com/uploads/1/3/2/6/132682974/mokukuvuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/ximoxabomar.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/27781830484.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/kixif.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/81575484487.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/51691157545.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/mumobawunuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/winukej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/veluzozorapegikusorol.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/domijoteku.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/lalimifilixewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/75069985017.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_off00006dc1.bin
f392ac3bbd7ee371d10ebf671997733e71a7941908e4bc982c63717b1b2c9237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 5092 bytes
font_01_sfnt_off00007f29.bin
b562dcf07884272f00e122753bad391325e1e56734245390b28ba2940dfa377d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F29 10836 bytes

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