Malicious PDF — malware analysis report

Static analysis result for SHA-256 689adef631adcca8…

MALICIOUS

PDF

37.4 KB Created: 2020-08-10 05:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543ce40c4caf13c404e6dc78eff663e5 SHA-1: 59042dbe495cb07bef3c3a37d7fa2dd21f113f03 SHA-256: 689adef631adcca81d22c278f7ce0b68114037fbf3046eb629a2f47292647d98
194 Risk Score

Malware Insights

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

The PDF contains a lure disguised as a study guide, which includes a link to a known malicious redirector. This redirector likely leads to a malicious payload or phishing page. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to increase visibility and traffic to malicious sites.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=ccsa+ng+check+point+certified+security+administrator+study+guide+pdf
    • http://files.media-education-portal.com/uploads/1/3/1/0/131070173/vulewuvumo.pdf
    • http://files.mutationpennants.com/uploads/1/3/1/4/131453870/dunemo_wuvowekurorenor_titigawedi_wakolidedesexaf.pdf
    • http://files.noon2moon.com/uploads/1/3/1/3/131379540/tumukikomek_bizukuzujof_banigafokowuzit_supexadarax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/4743/4905/files/adverbs_of_time_place_and_manner.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/70018616096.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/seven_wonders_of_the_modern_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/19281694754.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/52678665770.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/repibijamidoreb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/35497455612.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/www._directv_refresh.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/ulisse_aldrovandi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/58920815698.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/gozivutibetunusalagugarum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/berlitz_espanol_niveles_1_2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000465c.bin
7afe94d19f92e81c8b494040f5d6b5f50e191ceb7aa9a1699f37a5d0e12468bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x465C 5608 bytes
font_01_sfnt_off0000593d.bin
d78c14ecc0036a1d8e0cedceaf5f59e830a9df7e1180999a4418d00d2edf1bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 9616 bytes
font_02_sfnt_off00007a2d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 4324 bytes

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