Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab6f1119bd2c2e5…

MALICIOUS

PDF

55.4 KB Created: 2020-08-26 17:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d4882b2f95ec3f6b70a78b608d662b SHA-1: 343a9c2793cda3e39a4a1ee388c5b490811ae5a0 SHA-256: bab6f1119bd2c2e5894e94972d56ba0fad1740dae8efffdd7d7ee07673c702a5
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a beginner's guide to Bootstrap. The document body and embedded link structure indicate a lure to a malicious URL, likely for phishing or malware distribution. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=bootstrap+tutorial+pdf+for+beginners
    • http://files.rubyrosecowgirlclothes.com/uploads/1/3/1/8/131860938/japabideduzogaw.pdf
    • http://tevezif.lovejennynkaujnag.com/uploads/1/3/1/4/131455463/perojujezidilik.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/muzoxugul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/bailando_remix_enrique_iglesias.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/myrtle_beach_south_carolina_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/3698/9850/files/bionics_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/new_south_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/fezokopezejaxuxasosar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/94859593387.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/maximunimatibez.pdf
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/synovial_fluid_composition.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/71679150879.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/85190924971.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_off00008afd.bin
af07f9a9904475b358ffb9661714fff95ce20a0dee8e9a9298bdb67634d7d6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFD 5396 bytes
font_01_sfnt_off00009d63.bin
893ca64ec40f3792c6b9f12e0bedc668fad073c9b543c6d41564d3870f57eee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D63 16588 bytes

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