Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7066eb9ecc19d2…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 04:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cb3522cc32b486fde173b135678d6cf SHA-1: 6d9bd19cb432be73e2e7b61d8efc303fc70ac164 SHA-256: 6c7066eb9ecc19d2d72807baaf07d89fa3d3b8b8a5ddcdd8d339c0a7e120759b
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to look like Google Scholar indexing guidelines. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior, and the ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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.cc/pify?keyword=google+scholar+indexing+guidelines
    • http://rumelaf.dayesoutdoors.ca/uploads/1/3/1/0/131071063/fulodoba.pdf
    • http://files.eatthemommy.com/uploads/1/3/0/8/130815014/3438883.pdf
    • http://files.lanierlakehome.com/uploads/1/3/0/8/130873794/af5508d31fa34d.pdf
    • http://files.indorsia.com/uploads/1/3/0/7/130775257/meveziwagom_zesima_difosodesote.pdf
    • http://files.genecalculators.net/uploads/1/3/0/8/130813314/996a4b14908a4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/50774316302.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/cultura_de_arabia_saudita.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/die_blechtrommel_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/fleetguard_cross_reference.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/brave_new_world_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/8982/8771/files/definition_of_problem_solving_in_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/44888608240.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/bepivipekijiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/abraham_kuyper_lectures_on_calvinism.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_off0000670f.bin
c8ce5477d4d0f6d35056703d584de7389bd0d8df61a6c545426d666f73b2d2dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 5300 bytes
font_01_sfnt_off00007910.bin
c7a48c1066718ba4f2816fa50351726839651f93ede2c398817d221a57392ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7910 10144 bytes

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