Malicious PDF — malware analysis report

Static analysis result for SHA-256 7634fee685141529…

MALICIOUS

PDF

117.7 KB Created: 2020-08-08 01:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfcb1c61b70668d0f7c28104f718aa39 SHA-1: ec30b62ba65088c5cc2d9befcd674fafdf31e6f8 SHA-256: 7634fee685141529293e4d7a1ed9c694f1c78cd637cbd75eb57f2733fbb207f6
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics, suggesting the PDF's primary purpose is to redirect users to 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=aristofane+gli+uccelli+pdf
    • http://files.mehrscakecorner.com/uploads/1/3/0/7/130775969/fadibab_sinosodufogi.pdf
    • http://files.awarenyc.org/uploads/1/3/1/3/131383954/bedetuguduj_wuliwon_sulegetawa.pdf
    • http://files.wilcoxwellnessfitness.com/uploads/1/3/2/6/132681560/lefabuwubi-weziko-falase-tisev.pdf
    • http://files.danishclubnanaimo.com/uploads/1/3/1/3/131397987/jofakop-lemexibixokeku-dukobupa-vozikivogusupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2605/4306/files/83213390647.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/cristianismo_puro_e_simples_minhateca.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/90363210389.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/34058371504.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0561/files/belajar_gitar_akustik.pdf
    • https://cdn.shopify.com/s/files/1/0435/3022/3775/files/bixelalotupaxawaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/29892106396.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/93493710475.pdf
    • https://cdn.shopify.com/s/files/1/0452/4569/4112/files/business_plan_cover_page.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/grey_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/39676881762.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/busy_works_beats_chord_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/ralink_rt5390_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/lugamufumakuvifose.pdf
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/oxford_discover_grammar_1.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_off00019184.bin
18bb692355114e7381468abb37257dded966f62b4c7e6185eff1d29b34f311e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19184 5312 bytes
font_01_sfnt_off0001a3a5.bin
b088fb413ed03e7e54c4abaed57c59605b83d66c1258b7463eef30f209c76f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3A5 11196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.