Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6c9fc2ad3237ab…

MALICIOUS

PDF

46.9 KB Created: 2020-10-12 06:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e406cf0906251e187088724ebbeb63b1 SHA-1: 648fa436bf3a2159f9a5fbcc7d4bfe30cf49ed20 SHA-256: 9c6c9fc2ad3237abb35863ebaba2e22e090c763ba450afe2e307e790dbf2c97e
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is characteristic of an SEO poisoning or link farm attack. One prominent link, https://cctraff.ru/strik?keyword=jump+n+carry+jnc660+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be the manipulation of search engine results via a link farm.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?keyword=jump+n+carry+jnc660+manual In PDF document text
    • http://files.heritagechristianchurchsonora.com/uploads/1/3/0/8/130814430/kokajafenugaxidenuz.pdfIn PDF document text
    • http://files.patsartstudio.com/uploads/1/3/0/7/130776481/pilov.pdfIn PDF document text
    • http://wawuli.koalasboutique.net/uploads/1/3/2/6/132695671/bemikufejux_fumapix_lixusuj_losasi.pdfIn PDF document text
    • http://files.bikewritingbuilder.com/uploads/1/3/0/8/130874067/5dd82b.pdfIn PDF document text
    • https://site-1042007.mozfiles.com/files/1042007/8054465406.pdfIn PDF document text
    • https://site-1043890.mozfiles.com/files/1043890/zarobusisubidasem.pdfIn PDF document text
    • https://site-1042359.mozfiles.com/files/1042359/24442188593.pdfIn PDF document text
    • https://site-1043176.mozfiles.com/files/1043176/fojovapixegilup.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/1/0479/2628/0348/files/vonevevojotukamez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1505/1685/files/white_buffalo_wish_it_was_true_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2392/files/bifadujegukasij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3707/6889/files/boneti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2200/2587/files/13958239617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/herbert_marcuse_one_dimensional_man.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7972/1661/files/9136937508.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_off00007a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8A 5364 bytes
SHA-256: 5fcc856c9a976d8e965d841d009dbcb707c03a5ff7e3674e2005043590c8f6e5
font_01_sfnt_off00008cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 9836 bytes
SHA-256: 92389e3f6b4a1503fa1ce069a5d19cbcb873becb81ae84506a3ab5082e148744

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