Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2b43338ae4495f…

MALICIOUS

PDF

48.8 KB Created: 2020-07-09 20:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d045ab3b36bcb030054e9ca336aa5070 SHA-1: 1e94d277614e95044ca631180834251c563b77d7 SHA-256: 9f2b43338ae4495ffcf7b0972d017d16c02faa6c42befb7f9bab5295a9a60bcd
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links pointing to external PDF files hosted on numerous domains. The heuristic firings indicate this is a malicious redirector and a link farm, likely intended to manipulate search engine rankings or distribute further malicious content. One of the embedded URLs, 'https://ttraff.cc/wb?keyword=honda%20vtr250%20manual', is flagged as a known malicious redirector.

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=honda%20vtr250%20manual In PDF document text
    • http://files.mimimcp.com/uploads/1/3/1/8/131872303/5213070.pdfIn PDF document text
    • http://files.amicacup.com/uploads/1/3/2/6/132683259/9010216.pdfIn PDF document text
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdfIn PDF document text
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdfIn PDF document text
    • http://files.raphaelvillage.org/uploads/1/3/1/3/131381802/578370.pdfIn PDF document text
    • http://files.allfloorsinteriors.com/uploads/1/3/0/9/130969375/kexajize.pdfIn PDF document text
    • http://files.tinalouisecalidancecostumes.com/uploads/1/3/1/4/131454501/1456964.pdfIn PDF document text
    • http://files.shadysideofthetracks.com/uploads/1/3/1/4/131406762/9744250.pdfIn PDF document text
    • http://files.healthandjustice.site/uploads/1/3/1/4/131405940/jokeraj.pdfIn PDF document text
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bulijedakuve.files.wordpress.com/2020/07/wolunexadigexogem.pdfIn PDF document text
    • https://roderip.files.wordpress.com/2020/06/4626332638.pdfIn PDF document text
    • https://sinilufoxuzo.files.wordpress.com/2020/07/99664532610.pdfIn PDF document text
    • https://zetamuse.files.wordpress.com/2020/07/gijiluvazimetonovije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.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_off000077e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 4928 bytes
SHA-256: 97a5694b3b5546ef9797519602fe64587a3282058aca9a9e64cfa087678916b9
font_01_sfnt_off00008888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8888 14816 bytes
SHA-256: 658f5a71879715111f813cb50ca6ccbbfe8f57957f841c9fd9f4d0dbed8adec2

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