Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cd3b2c98fbbcc7…

MALICIOUS

PDF

37.0 KB Created: 2020-08-22 04:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ccee96893a49d34c23a2b1183f20ab9 SHA-1: e036f90e123a4c46e590f45358c82829ab18fabf SHA-256: a5cd3b2c98fbbcc70ade51f4fc2ad3ee2a1162e1eeb27c17396ba9a181c8981d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains references to 'Citrix receiver version 4.6' and a URL that appears to be a lure. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or redirection strategy. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector.

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/pify?keyword=citrix+receiver+version+4.+6
    • http://newitejef.angieemilyjoseph.com/uploads/1/3/1/3/131383544/73cb449ae446f4.pdf
    • http://pupag.nhcapcadets.org/uploads/1/3/2/6/132683014/8353045.pdf
    • http://webed.moodyplumbinginc.com/uploads/1/3/1/4/131438044/3458667.pdf
    • http://tevezif.lovejennynkaujnag.com/uploads/1/3/1/4/131455463/perojujezidilik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/78742430537.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/2009_volkswagen_tiguan_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/kulapupotulu.pdf
    • https://cdn.shopify.com/s/files/1/0450/3647/0430/files/nbi_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/69272409289.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/namavoludanejafuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/corona_sdk_platformer_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/95289035869.pdf
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/82988346618.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/deleted_tweets_archive.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/aldol_condensation_notes.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_off000054cc.bin
0707cb33fc2e5d0162ea78ccf7cdbd62e5afadcdb28568b5da2b2647c2e798d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54CC 4856 bytes
font_01_sfnt_off00006577.bin
4d5a6a4471f4352783b807d090a042716e5186c1310ae8d70c97d7cb446ea60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 9968 bytes

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