Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a1aa064fedba5d…

MALICIOUS

PDF

72.5 KB Created: 2020-08-14 23:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 046157bb2df39a6ddbb3f11378a54a66 SHA-1: 90c1c6610b39b1ef7972ff831bf536c949ce0deb SHA-256: 67a1aa064fedba5d26120306c24b8568553c11dceb4fa83fc355fd80a9e5a1be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised as a search result. This indicates a phishing or redirection attempt to deliver a malicious payload. The document body and embedded links suggest a lure related to books or academic content, likely to trick users into clicking the malicious link.

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/wb?keyword=alexandra%20david%20neel%20books%20pdf
    • http://files.foxcroftarts.org/uploads/1/3/1/4/131413766/f42b66.pdf
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/3848/7206/files/waves_vocal_bundle.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/xofaninejusudov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/6344682141.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/aitsl_standards.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/72381429952.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/monijonawalubulix.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/wugumigojiroxuxawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/tusiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/valores_normales_de_una_biometria_hematica.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/1276359313.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df34.bin
e212b51bd5537894429ab7f4e6767479071c952635a91093dfdeca661823e543
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 5356 bytes
font_01_sfnt_off0000f176.bin
b72dea5832629dbef8759266a242e8ec911f83fc8da384fcaeae008fb95bc66f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 11020 bytes