Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8888306db1c9bb1…

MALICIOUS

PDF

44.8 KB Created: 2020-08-16 20:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d1057209b7891057af31520fc62b48b SHA-1: dc6ce819de32ff6fb1430f12eb0debcac7958971 SHA-256: c8888306db1c9bb1bc9c425e3a1cd504bdc42b18ccb1864f0535051959e0a96b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com, which is used to lure victims. It also contains a heuristic for a PDF link farm, with many links pointing to Shopify domains, one of which is the primary IOC. The document body contains the malicious URL and several other PDF links, reinforcing the lure.

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=apologia+de+socrates+gredos+pdf
    • http://files.gwinnettcarpetpros.com/uploads/1/3/0/8/130874350/f618f9.pdf
    • http://rubez.charlemagnemilitaria.com/uploads/1/3/0/8/130874329/pivalonadijesowebuju.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/vuxudovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/hernia_epigastrica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/32491777211.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/41600012095.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/example_of_anecdote.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/dinidezudufojikaxakefaxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5323/3814/files/antimalarial_vaccine.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/winscp_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/86860986330.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/jonefowama.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/thirsty_crow_story_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/45848536172.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/barron_s_act_practice_tests.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/atmega32_datasheet_download.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_off00006f15.bin
d0076692c2f1a2719699d3a7053a696fbb921d9a6919e09cfcbc8fb312ce4953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 5312 bytes
font_01_sfnt_off00008132.bin
73d427759d42daa00646a64e4c8fec7960e2924a11289938d20b707af2d823e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 11124 bytes

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