Malicious PDF — malware analysis report

Static analysis result for SHA-256 197ac917a96fd9d9…

MALICIOUS

PDF

40.6 KB Created: 2020-08-24 06:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e3f0a4998e5180d3ff95fc8caccecdc SHA-1: 3b4ceba1acf9ff8c01522000310f67857b758d5e SHA-256: 197ac917a96fd9d99d34592226526af76f95f0b9e69afde79b43fcd34d64acca
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=cute+baby+pic+wallpaper++hd, suggesting a lure to a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cute+baby+pic+wallpaper++hd
    • http://guler.runnyknows.com/uploads/1/3/0/7/130776647/donus-nanalin-vibezanuludan.pdf
    • http://files.tweedsalonspa.com/uploads/1/3/1/8/131856353/c6a50e916f.pdf
    • http://files.drinkyourcarbs.com/uploads/1/3/1/4/131437333/gatasuxokowajerovew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0460/1354/6657/files/binunadavokeju.pdf
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/galibejixuwiborebetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/ipfire_raspberry_pi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/58649646103.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/dulaxafalixu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2581/files/93433326866.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/2_stroke_si_engine.pdf
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/81420613891.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/kireniwomaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/20436004849.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faxusumowavunisipor.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb9.bin
06fbbef9d3784954cec64086921c95f7e13c573e92cb419d7b4a8a745edbfb93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB9 5004 bytes
font_01_sfnt_off00005de2.bin
5deefdbaf1e00a0052df5b5d08d972efad40a2873f6bc83117c198e0dcc6db3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 13208 bytes
font_02_sfnt_off00008793.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 4324 bytes

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