Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfdd778fabda173…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 20:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9377ea5b874c4820600275d08e1d44cd SHA-1: 8110ffa0100ad8e83e7270dafc64a6bf7177238f SHA-256: 8cfdd778fabda173911dac14be8e4b026ca661e1ca0747f9c5e733acd46650ed
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a phishing or scam attempt where the user is intended to click the malicious link, which then redirects them to further malicious content. The PDF itself appears to be a lure, possibly related to educational materials given the 'esl intermediate reading nature' keyword in the URL.

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/wix?keyword=esl+intermediate+reading+nature
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/20891841491.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/33327305275.pdf
    • https://cdn.shopify.com/s/files/1/0439/2439/0056/files/37849674703.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/clarinet_articulation_exercises.pdf
    • https://static.usrfiles.com/ugd/374ce0_e51d1adb7ed94ea98204fd0c526a039a.pdf
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/bowditch_rule_and_transit_rule.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/60022920036.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/topojson_world_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/al_ghazali_le_livre_de_l_amour.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/starboard_value_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0431/2252/4326/files/dough_sheeter_machine_for_home_use.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/wijusutajitosivutuzamuse.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_off00007180.bin
7159ae1094631da30f68d6bc0b754127b070c54b585c5b9a66e4560a2b847d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 5100 bytes
font_01_sfnt_off000082ba.bin
6defc5d01373de7f804feb1a7418afc3cd89b3b69a54caa4dfe8a7b1600ca1a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BA 10540 bytes

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