Malicious PDF — malware analysis report

Static analysis result for SHA-256 1423cfafd6ce22de…

MALICIOUS

PDF

39.4 KB Created: 2020-08-19 10:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f252a65d55a6829be676af322c299ff SHA-1: c810c1a9c23e3119b384c0ab6264fb2c70b39433 SHA-256: 1423cfafd6ce22de1af1c88772750c1256f8f04beeb98028964c9aac47e23c6d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though partially obfuscated, contains text related to a 'beard hair brush photoshop free' lure, suggesting a phishing or scam attempt. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.ru/pify?keyword=beard+hair+brush+photoshop+free
    • http://files.mygentlebeginnings.com/uploads/1/3/1/4/131453456/7332417.pdf
    • http://files.robertinconcert.com/uploads/1/3/2/6/132680796/d62a078a.pdf
    • http://files.molliesmorsels.com/uploads/1/3/0/7/130776521/dovetuvipe-barasesabigupeg-woxik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/solo_leveling_novela_ligera_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/wozorulofesewakidubidejo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/90372065124.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/taxinanupamebevuxirigome.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/momidovajilowowepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/nezirev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/vedic_astrology_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/15804677908.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nevumebatezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88065476392.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/kananinevegos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/gozolulogonurobuvisenisad.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_off00004968.bin
451669ea1c933feca1e4f4dec4edab339f3c4694a2c461e670db216447018287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4968 5064 bytes
font_01_sfnt_off00005aac.bin
360c6a0d46bf7e0e76dbb7ff295d0d6755080cce2545e3519cfa19b83210ed91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAC 12936 bytes
font_02_sfnt_off0000827f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 4324 bytes

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