Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dd4022c4df18a9…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 11:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65f19babacf7287773441fcc457a3e47 SHA-1: 6e5ac552cf581ab8ff38e23999d14e46e66634f3 SHA-256: 34dd4022c4df18a9e16c12ab9b83bc9dcbe1f2bc111bb1d77d86310403db11d1
120 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with many URLs pointing to Shopify domains and one primary redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary URL, https://ttraff.cc/wb?keyword=english%20practice%20papers%20for%20bank%20exams%20pdf, leads to known malicious infrastructure. The document body text, though partially corrupted, contains keywords related to exam papers, suggesting a lure to entice users to click the malicious link.

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/wb?keyword=english%20practice%20papers%20for%20bank%20exams%20pdf
    • http://files.guildofoccultsciences.org/uploads/1/3/1/4/131453124/f4939af0fe.pdf
    • http://files.nikkileon.de/uploads/1/3/0/7/130739443/2330358.pdf
    • http://goviku.dimage.com.sg/uploads/1/3/1/4/131483044/4b58f3007.pdf
    • http://runogebi.dariodidonato.com/uploads/1/3/1/1/131164312/tenepejarupup-besimigigi-xidalalid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/pofisugesufamug.pdf
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/42959259713.pdf
    • https://cdn.shopify.com/s/files/1/0429/6291/1391/files/20732200024.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/vunibakexivagadovef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/munobedifafevowonupoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/jasupulijufiwibigumuzegoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8700/files/muthoo_bargaining_theory_with_applications.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/fleetwood_mac_dreams_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/simple_past_tense_story_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/sidapitonesawedal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/danusopajedu.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_off00006e97.bin
808c4f011e8c361cc60c905efcf250ebe8b0c25e68bc0b970e0ab934d1c2c775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 5800 bytes
font_01_sfnt_off00008220.bin
ae5dcd4539ae195d501884ba3d9061ee0e8cfee716558621fd5d20947ee2399a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8220 10416 bytes

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