Malicious PDF — malware analysis report

Static analysis result for SHA-256 497c1325e7f20514…

MALICIOUS

PDF

34.7 KB Created: 2020-10-27 05:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f5102c1dbe804e8a8de4ae2b6fdb37 SHA-1: a3684760ddd16729043e8da7b575fe01218e8ca6 SHA-256: 497c1325e7f2051483b3eeac2a53445ade25e1eb4ef7c86c003f41d6c8e71240
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. The PDF_SEO_LINK_FARM heuristic suggests a large number of links were embedded, likely to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ggtraff.ru/strik?keyword=non+mendelian+genetics+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0478/1834/2559/files/industrial_craft_2_classic_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2267/files/barrons_ap_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0505/2563/4756/files/gimoxanunomuliwagodolup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6923/3565/files/gubewurojepuguf.pdf
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/dosafofirukulumof.pdf
    • https://s3.amazonaws.com/kakekojezutok/mojivalojalal.pdf
    • https://s3.amazonaws.com/vonusirukete/runumajiruna.pdf
    • https://s3.amazonaws.com/fenatagazise/abbyy_reader.pdf
    • https://s3.amazonaws.com/pazerogasarinu/veravataseperipugen.pdf
    • https://s3.amazonaws.com/henghuili-files2/31468820047.pdf
    • https://s3.amazonaws.com/xurixado/lexonijipirabojutop.pdf
    • https://s3.amazonaws.com/takateg/i_am_not_alone_piano_sheet_music.pdf
    • https://s3.amazonaws.com/henghuili-files2/actinomyces_spp.pdf
    • https://uploads.strikinglycdn.com/files/8cc9df55-51c4-483a-bc41-66e10214957d/nasm_essentials_of_corrective_exerci.pdf
    • https://uploads.strikinglycdn.com/files/9a86ba67-1337-49a0-a6e2-525a00862672/vokomididazomole.pdf
    • https://uploads.strikinglycdn.com/files/8f137d3c-c32e-46b4-9834-65e2d1e39ba3/43207222881.pdf
    • https://uploads.strikinglycdn.com/files/4af0d117-5ab9-4ec6-a5d6-ea2ddd89e258/merck_manual_of_medical_information_latest_edition.pdf
    • https://uploads.strikinglycdn.com/files/eb929ed0-1d45-4f3a-aad1-eb8ff065e830/72158083307.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006875.bin
d04d3e83d4b8270d810ffab1dfdb5569f8b2f31dae5fc75be39a1f8307b02bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6875 5476 bytes

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