Malicious PDF — malware analysis report

Static analysis result for SHA-256 081fa6c504a5120d…

MALICIOUS

PDF

57.1 KB Created: 2020-10-05 03:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: beb9ab90ae3856b95e019c9dd4e2fd88 SHA-1: 12981ba00c8dbc5064c40619c58ab6705919256b SHA-256: 081fa6c504a5120daaec32a80b9f0320fe006e4b91ae1f3b4a942952d7768abb
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body is heavily obfuscated, and the presence of multiple links to disposable hosting services suggests an attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link analysis strongly indicate a phishing or redirection attack.

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://ggtraff.ru/strik?keyword=the+whole+armor+of+god+prayer+by+cha In PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/66841712626.pdfIn PDF document text
    • https://site-1042345.mozfiles.com/files/1042345/deravusokuzi.pdfIn PDF document text
    • https://site-1040249.mozfiles.com/files/1040249/vonazazumeworusiv.pdfIn PDF document text
    • https://site-1039319.mozfiles.com/files/1039319/faxipesowusat.pdfIn PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/81676382298.pdfIn PDF document text
    • http://files.fromthegardengiftshop.com/uploads/1/3/1/4/131437567/01958c0142.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/1/0435/9140/1627/files/gobidagorufajoxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1500/1496/files/female_horse_names_funny.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2471/7723/files/lq4_vs_lq9_hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d21241-32fa-4656-9aef-9274c5e155be/xuretezefakej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dacd3347-cf4d-4cd7-b89c-74bdf67ef0b1/fogelasodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da244425-8f06-4154-9d75-e701619d88a5/kozenu.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_off0000a1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D9 5672 bytes
SHA-256: 8c054d8390cc4dc55206f584ee8545af338e4ccbfac13fed5bf3f7a4985ecd97
font_01_sfnt_off0000b512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB512 9996 bytes
SHA-256: f508a7d821103a17040fc5ef197d39730c23241adac2ae333d0e87193e16cde1

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