Malicious PDF — malware analysis report

Static analysis result for SHA-256 1939a75ee9d53e01…

MALICIOUS

PDF

42.0 KB Created: 2020-09-18 16:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b21a7852b1e826f6724dd719be435f3f SHA-1: 7cfbb5be2af214f9219106578115355454717080 SHA-256: 1939a75ee9d53e01b59671f4310d99c52fba4d7fbdfa455d2131dbb2f239be3d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a payment redirection lure, suggesting a business email compromise attempt. While the PDF itself does not contain scripts, it leverages external links to potentially 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.club/wix?keyword=echo+dot+2nd+generation+manual+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/1933/7629/files/shopify_contact_form_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/31344483286.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/9580761829.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/captain_marvel_comic_1.pdf
    • https://084e52b9-8451-442f-ad47-e45686dff561.filesusr.com/ugd/668a47_b2b3e225023b4043b5a19f72f2bd9efd.pdf?index=true
    • https://1964dba0-0c94-4a61-8e0c-7134eddc5f98.filesusr.com/ugd/1e4819_de84fb9bdf344b77ae1193bcebb31751.pdf?index=true
    • https://e4873c72-e72f-4961-a5ad-65968120f8e3.filesusr.com/ugd/81cd61_ee5990aa20634692bb67ca53274755d1.pdf?index=true
    • https://d8ce4151-1697-410f-8e65-c0fe17492904.filesusr.com/ugd/227d0f_410df344b0fc45889438ccc3e60ad78d.pdf?index=true
    • https://1bcede11-a634-4114-9120-628033926796.filesusr.com/ugd/6924eb_918d5d2951f94cbc890a3476bb62e7cb.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0464/4981/9816/files/tabavapagekilulodaxi.pdf
    • https://cdn.shopify.com/s/files/1/0465/4956/5590/files/anton_lavey_book_of_leviathan.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9898/files/tokyo_itinerary_5_days.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/trane_xv90_manual.pdf
    • https://cdn.shopify.com/s/files/1/0485/3255/3883/files/liga_boliviana_en_vivo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/18594979526.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/64136450549.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_off00006557.bin
d4eaae0353066befb4952f05ebe206967f04957efafa0b7418640060cc790273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5480 bytes
font_01_sfnt_off000077d9.bin
66cf745d6d0f023147aa326eadbdbed6f93ed60df51aeda7bdb32de424700e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D9 10360 bytes

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