Malicious PDF — malware analysis report

Static analysis result for SHA-256 6774f38526706f93…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 07:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c67fb7d260752da240736f61648a5dd6 SHA-1: ef6b44a0dc04728f443f386b3403f7cba89b7de5 SHA-256: 6774f38526706f93eb03e5864d6fe97c3355f61b95503894bfbf2cfec5158ae4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a psychology PDF. This indicates a likely phishing or malware distribution attempt. The document body itself is heavily obfuscated but contains the malicious URL and numerous other URLs, many pointing to Shopify, suggesting a link farm or content stuffing technique to appear legitimate. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence strongly suggest malicious intent.

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=introduction+to+psychology+pdf+file
    • http://files.kartzinellab.com/uploads/1/3/0/7/130739116/zewuvepusikasepiloz.pdf
    • http://dofix.wrinklecreative.com/uploads/1/3/0/7/130776485/taduba_bogojevula_mujurubu.pdf
    • http://gulot.quantummentalfitness.com/uploads/1/3/2/3/132303374/vuxoxoruxalonufape.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/add_blank_page_nuance.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/64037282786.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/lore_of_the_clans.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/vce_to_converter_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/rozofatizubotobajatudis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/18986152718.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/1004/files/29411352524.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/zatitas.pdf
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/bhagavad_gita_15th_chapter_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/rufixibek.pdf
    • https://cdn.shopify.com/s/files/1/0450/4708/7262/files/search_text_in_with_python.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_off00007052.bin
6a357023e848f8b582063e111b990df213da6975c991fd50d81739e7d40f5745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 5248 bytes
font_01_sfnt_off00008235.bin
bc620f24372c2ee9de12159cb4fbb1725b80139c52962dfc732b8ffe3724a7a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8235 9816 bytes

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