Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bab983721b5a030…

MALICIOUS

PDF

40.8 KB Created: 2020-08-20 02:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5859ea055aed563f3b8073a015f491b7 SHA-1: b7d78fd78e081c6dacd5e643a9914854f9212945 SHA-256: 8bab983721b5a030226dfa2f4c5473e55d3d64c92df223d4dcdfe4f1ff862445
120 Risk Score

Malware Insights

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

The PDF contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of outbound links, many hosted on cdn.shopify.com, likely to obscure the malicious destination. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector heuristic, 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=substitution+and+elimination+worksheet
    • http://files.springsteched.net/uploads/1/3/1/6/131637553/884f48437fea2.pdf
    • http://files.dubayhomeinspections.com/uploads/1/3/1/6/131606331/9956858.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/famous_english_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/88177820114.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/bosizikizitinigapan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/19973916280.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/team_extreme_minecraft_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/mobojofat.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/bihar_tet_computer_science_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/29889529436.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/48022324711.pdf
    • https://cdn.shopify.com/s/files/1/0449/5795/8299/files/ccnp_labs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/fovizagogekelejiredi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/dota_2_turbo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8146/6005/files/51359713760.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_off00005e81.bin
119fe24a17ffe45d596ce7ccf2dac9fc28b4f1b9b682e68f62fcd3c847424c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E81 5464 bytes
font_01_sfnt_off000070ef.bin
d08799e9f32f6c05974f97cdb120a0c30964e280e899250d779d0b380a594e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EF 11356 bytes

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