Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0352daeae25e00…

MALICIOUS

PDF

59.3 KB Created: 2020-07-30 20:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ca25aa25105143e020f365a3ad7791 SHA-1: ffd95de2bd370f5b0121492810296202e81e0f69 SHA-256: 6b0352daeae25e00c0ce31a968c6c866462166833d383b4cb793aac23142fa7c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service, which is a common tactic for distributing malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the URL 'https://ttraff.com/pify?keyword=asma+bronquial+pdf+gina' as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to artificially inflate search engine rankings or distribute content widely. No scripts were extracted, but the presence of malicious links is sufficient evidence of 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 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.
  • 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.com/pify?keyword=asma+bronquial+pdf+gina
    • http://files.redrockpei.com/uploads/1/3/1/1/131163780/e7ecf5.pdf
    • http://files.dancingchickjams.com/uploads/1/3/1/4/131453250/eb52570f.pdf
    • http://files.invitations-party.com/uploads/1/3/1/6/131637953/7106885.pdf
    • http://files.pmbaptist.net/uploads/1/3/1/8/131856339/4376663.pdf
    • http://files.teaandmascara.ca/uploads/1/3/1/8/131871994/dd0020ea4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0559/1200/files/35064187279.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5382/files/tatimoxuzaxogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/40068650725.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/bifewabev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/sufavumaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/ligisilonigigosurofefida.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/7424939121.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/74139920982.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/bemow.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3282/files/guzub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/xigura.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/robufamikam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abb0.bin
735180b343772423fca2970563b7526a72067c90393417e33247cb9e9a588db9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB0 5300 bytes
font_01_sfnt_off0000bd74.bin
606920b1763721ebd99dabb7df516a0eae7c52b64bbeaf604c4375db8a7a0bdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD74 10016 bytes

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