Malicious PDF — malware analysis report

Static analysis result for SHA-256 61778641f9710043…

MALICIOUS

PDF

42.9 KB Created: 2020-10-06 15:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d3f272636ffa87234924d634a81ff64f SHA-1: 97e60143b375c9822a0a35a8132c1871cc787853 SHA-256: 61778641f971004350861beac2ed050027e50ebd3126cc183db5a2f36aa62f89
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm hosted on disposable domains. The primary redirector URL is identified as malicious infrastructure. This suggests the PDF is designed to lure users into clicking malicious links, likely leading to further malicious content or phishing attempts.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/pify?keyword=ernest+hemingway+iceberg+principle In PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/jusibapolenaren.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/90940435778.pdfIn PDF document text
    • https://site-1041198.mozfiles.com/files/1041198/23451248837.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/26084588169.pdfIn PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/mizum.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/kowatekefaledogugevebo.pdfIn PDF document text
    • https://site-1038780.mozfiles.com/files/1038780/62281782430.pdfIn PDF document text
    • https://site-1040346.mozfiles.com/files/1040346/tovuwobasopu.pdfIn PDF document text
    • https://site-1040259.mozfiles.com/files/1040259/47571181927.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/tutamaxo.pdfIn PDF document text
    • http://files.galvinbands.com/uploads/1/3/2/8/132816185/0a5c2d2.pdfIn PDF document text
    • http://files.micheledewinton.com/uploads/1/3/1/0/131070113/godaxasagexibo_jinolujekari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3093/2387/files/4_and_goal_2018_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7194/7161/files/xuloparerenefuwafigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/bujulikawibonimijixumemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0721/6280/files/sumebugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/novilosel.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E6 5640 bytes
SHA-256: 87ea785fe441fc27d47945e8de27129e9f7301b9f145caddd0c43adb9b30df01
font_01_sfnt_off00007c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 10128 bytes
SHA-256: 4fc8f625870bb9d783d00b28810e60bc1c13a1332ef0dace7d544d13cb6a7f35

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