Malicious PDF — malware analysis report

Static analysis result for SHA-256 718327ea62458477…

MALICIOUS

PDF

97.3 KB Created: 2020-08-11 07:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69483280e0e923799a63e86a545c7708 SHA-1: ae787ef76f712f17d470ea5f46167222ea42a5fb SHA-256: 718327ea6245847757d1a6e618aac793c8b8c97306044dec3956711c0bc142c4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect the user to malicious content, likely for phishing or malware delivery.

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=abandono+escolar+tesis+pdf
    • http://files.earthybydesign.com/uploads/1/3/2/7/132710627/529370.pdf
    • http://files.thielkearboretum.org/uploads/1/3/0/7/130739833/kabukemobo.pdf
    • http://files.globalqualityenglish.org/uploads/1/3/0/7/130739524/jaxodajerizag_babum_bukojusaf_zomej.pdf
    • http://files.landerbodyworks.com/uploads/1/3/1/4/131437380/5990280.pdf
    • http://files.hkcfoundationforparkinsons.org/uploads/1/3/1/4/131438441/voludidimodejob-zagovato.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/playboy_the_mansion_games.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/jasobovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/siyavula_grade_11_physical_science_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/4297955528.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/fupejonemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fusuzirosaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/acidosis_metabolica_anion_gap_normal.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/international_accounting_standards_1_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/23614508596.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/super_robot_wars_mx.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/lefagawuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/livro_epidemiologia_basica_bonita.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_off00013dcb.bin
91ca463324f7e3203783f3497e4974c2202077ad80b9e46bbaf4d75f201811cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCB 5276 bytes
font_01_sfnt_off00014fc3.bin
1353b527ba0966632b11582e504ec9bf6ea6b15974f4aa7f2f78ae9fb3740ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC3 11976 bytes

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