Malicious PDF — malware analysis report

Static analysis result for SHA-256 c995d120aa1fdb46…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 00:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c24e1177b3098a1bd3eb12b369fcf8b SHA-1: a2209317b878d67110c516bcd71e2979fe4d5437 SHA-256: c995d120aa1fdb466994861fadb08a28c16a8c8a0864805902aef539c99e73ac
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning technique designed to lure users to malicious content. The document body, though heavily obfuscated, contains the malicious URL and references to PDF links, reinforcing the attack pattern.

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=ziekte+van+crohn+symptomen
    • http://files.stevenleeweintraub.com/uploads/1/3/2/6/132681985/3620390.pdf
    • http://files.crishayantis.com/uploads/1/3/1/3/131379761/xemar.pdf
    • http://files.vvsahs.org/uploads/1/3/1/8/131871970/nataruvizawogixeluti.pdf
    • http://files.uncbearsvolleyball.com/uploads/1/3/0/7/130775519/xulefiv-xizewamotoze.pdf
    • http://files.mriteacherresources.org/uploads/1/3/2/8/132814272/9336362.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/casanova_games_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/47674233650.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/3176805245.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/monefibefera.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/19070647503.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/bumajefawujug.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/24078596106.pdf
    • https://cdn.shopify.com/s/files/1/0447/7698/0629/files/illinois_annual_report_forms.pdf
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/30994554742.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/doraemon_ka_cartoon_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/proletariat_vs_bourgeoisie.pdf
    • https://cdn.shopify.com/s/files/1/0434/5302/2369/files/engineering_mechanics_statics_dynamics_5th_edition.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_off00006c98.bin
2e18b4a7c32c08e6781e220094a5d0d3c561937bf9e0d2cef41acab4225c7a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C98 5324 bytes
font_01_sfnt_off00007e96.bin
6850721b4fca4133c1b9a016416ffa0eee12968b3a9771a2e46a7b097bce56ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E96 10264 bytes

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