Malicious PDF — malware analysis report

Static analysis result for SHA-256 0527b4bb12940b0d…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 01:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 960b0f753057b26f7d27790738a385a5 SHA-1: 4038f1c468b0cb360d35e2dd83a1d0619fc7ae09 SHA-256: 0527b4bb12940b0d5b4547b7ad315bd597a2c8142aa4e33bfc61ff9b7f781f20
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=cursive+alphabets+capital+letters+pdf, is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous links to other PDFs hosted on various domains. The ML classifier strongly flagged this PDF as malicious, and the presence of invoice-like language suggests a lure to encourage user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=cursive+alphabets+capital+letters+pdf
    • http://files.toacarving.com/uploads/1/3/1/3/131398591/6125194.pdf
    • http://files.rhfarmersmarket.com/uploads/1/3/1/8/131859895/4f31f9775b79c5.pdf
    • http://files.missiontruespirit.org/uploads/1/3/0/9/130969740/wutusur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5732/3925/files/bajimozowaduw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/gozanubawuxode.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/48133534759.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/girunifiviluvesesitusapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/nugijezedajiles.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/kerosene_poisoning.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/credit_card_statement_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/important_questions_for_class_12_hsc_biology_chapter_wise.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/4213834075.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/libro_el_poder_curativo_de_la_cabala_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kurejala.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/mcdonalds_allergen_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/86549806664.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_off00007abb.bin
a0488aa8201e65d0878983a29372928bb791e6bb9edc6ee1960bb1c8f471c56d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 5348 bytes
font_01_sfnt_off00008cde.bin
cb9f48bbd1b497cf771fda1c634a0b7fb32311c272a428ce6290848964af2219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDE 10624 bytes

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