Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac720948c44a6e14…

MALICIOUS

PDF

60.4 KB Created: 2020-07-09 07:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 981164739b28ff3596cc08a8d9519456 SHA-1: aa96da559fb24657555dc0f5540b52c159d04545 SHA-256: ac720948c44a6e140e109e909399447123ff6cae316430b3c2eeef4d18d8f639
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=toxocara%20canis%20ciclo%20biologico%20pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body text is heavily obfuscated but appears to contain the same keywords as the malicious URL.

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.
  • 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://ttraff.cc/wb?keyword=toxocara%20canis%20ciclo%20biologico%20pdf In PDF document text
    • http://files.elizabethlayton.com/uploads/1/3/0/7/130739856/42382dc68df616.pdfIn PDF document text
    • http://files.ewiechart.com/uploads/1/3/2/3/132302913/gomokiwu-dapewijutufose-jofumuvusu.pdfIn PDF document text
    • http://files.sandaharrboerboels.com/uploads/1/3/2/6/132681566/6896535.pdfIn PDF document text
    • http://files.beyondseattleeats.com/uploads/1/3/2/6/132695273/8068464.pdfIn PDF document text
    • http://files.nsm-glh.com/uploads/1/3/1/3/131383575/c63f4d9a5a.pdfIn PDF document text
    • http://files.hamiltonwindowtinting.co.nz/uploads/1/3/1/4/131408528/nejunizalijilu.pdfIn PDF document text
    • http://files.ritaguile.com/uploads/1/3/0/7/130738708/tivumirobopug_xakomixanofixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lotosam.files.wordpress.com/2020/06/kebowewijorowen.pdfIn PDF document text
    • https://mekefejirum.files.wordpress.com/2020/07/46181040195.pdfIn PDF document text
    • https://zobekak.files.wordpress.com/2020/06/faxurufoluzisoditodud.pdfIn PDF document text
    • https://povunefuw.files.wordpress.com/2020/06/95671076380.pdfIn PDF document text
    • https://gefadosujugi.files.wordpress.com/2020/06/75386972826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF93 5068 bytes
SHA-256: 2d19851648f48f947e40852bfe4eaa678a90814ce4891d1261c126cfc49a14bf
font_01_sfnt_off0000c0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C1 10984 bytes
SHA-256: 6733edf4ad22616b26a20cc07c89245cd3ea493cb7d85a51bdcf134f0fdde82a

Open this report in the interactive analyzer, or submit your own file for analysis.