Malicious PDF — malware analysis report

Static analysis result for SHA-256 37364f56da14780c…

MALICIOUS

PDF

47.6 KB Created: 2020-08-24 16:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74114aa2d11df8369ffcabad1547ecfa SHA-1: 8dd6baf18d9bde701290bcc540e31dd367630cc4 SHA-256: 37364f56da14780c4fd3f8ebbda4571eb8e26eb6ef24fa81b7fb8faeeee22ba3
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 URLs, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, also contains the same redirector URL. This suggests the primary purpose is to lure the user to malicious infrastructure through a chain of redirects.

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=bisection+method+matlab+program+pdf
    • http://files.blainsport.org/uploads/1/3/0/7/130775103/1734902.pdf
    • http://mudusan.endurancepilatesandyoga.com/uploads/1/3/0/8/130874410/6551377.pdf
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/62278486305.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/sifijube.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/zexirutopemosodo.pdf
    • https://cdn.shopify.com/s/files/1/0460/1964/1503/files/diabetes_driving_guidelines_australia.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/51950065467.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4470/files/hypertension_icd_10_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/32874503428.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/jurenogigamizegituzaduxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8373/4943/files/viruses_and_other_malicious_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/6th_grade_math_common_core_standards.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_off00006dbf.bin
a1704060a25e277462bcbac992a02d8b6504ded7037bc3f3d83229d579531f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBF 5760 bytes
font_01_sfnt_off0000811f.bin
e7a9d7451125e1eeb15858963530c22be8200a89dbb4558db0d35a143da197ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811F 15708 bytes

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