Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f855120878362fb…

MALICIOUS

PDF

46.0 KB Created: 2020-07-21 07:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 6ce3a5aa2c374adc4b6152bf3c3a4585 SHA-1: 9852e8b8d6c0ef03893abc307cd058dcee959882 SHA-256: 2f855120878362fb85e204056027faa78cfbfd6c70da37121e661a82a94adbac
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.ru/wb?keyword=antienvejecimiento%20nutricion%20ortomolecular%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to the lure, suggesting an attempt to trick users into clicking the malicious link.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/wb?keyword=antienvejecimiento%20nutricion%20ortomolecular%20pdf In PDF document text
    • http://files.bloomingfulbirths.co.uk/uploads/1/3/0/9/130969371/4362299.pdfIn PDF document text
    • http://files.fluffdesignsco.com/uploads/1/3/1/1/131164308/1a01f2a6f8b88.pdfIn PDF document text
    • http://files.jotuncap.com/uploads/1/3/1/1/131163734/zinabafedaj-zuzabibajasepog.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/1/0432/4907/4336/files/20289387623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/71966767211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/kexilewuzola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/rigosubujoxepoxo.pdfIn PDF document text
    • https://xovexin.files.wordpress.com/2020/06/wutuzuremizenokevi.pdfIn PDF document text
    • https://javasevob.files.wordpress.com/2020/06/tovabalasegunavevorida.pdfIn PDF document text
    • https://juleweviv.files.wordpress.com/2020/07/regobepame.pdfIn PDF document text
    • https://piwelil.files.wordpress.com/2020/07/60943054933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/sekofigodekovotexefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/rusufuxilutavurebefus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xufotafaxesejurozuwopim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/filurobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/35073102227.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_off000072ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AE 5128 bytes
SHA-256: 6fe60deeff4df9e1fc352d8661447860617fd25ed116bce710e4fd3edb0457b6
font_01_sfnt_off00008407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 11400 bytes
SHA-256: 137be736e1078c17491aa5379fcb65b5956635b03f206544cb7f3972338edb29

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