Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdf6c5700ff6cc1…

MALICIOUS

PDF

42.7 KB Created: 2020-07-21 17:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 434e88bb70f947816a836a494496e79e SHA-1: 95bd7cda874018f438bc48244829d6af72587bdc SHA-256: 7fdf6c5700ff6cc118b52b3ccb7d1a1a1741b4c15b41542748ccc185b38d71f9
194 Risk Score

Malware Insights

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

This PDF file contains numerous links pointing to a redirector service, which is a common tactic for distributing malicious content or conducting phishing campaigns. The heuristic firings indicate a deliberate attempt to create a link farm for SEO manipulation, likely to lure unsuspecting users to malicious sites. The embedded URLs and the overall structure strongly suggest an intent to redirect users to potentially harmful destinations.

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=seoul%20garden%20hotpot%20menu%20pdf In PDF document text
    • http://files.lhfministries.com/uploads/1/3/1/6/131637038/25f9aac5.pdfIn PDF document text
    • http://files.rivalfilms.co.uk/uploads/1/3/1/8/131856624/bugaviradibe-rujubokefage-fikutazojumiwun-xetaka.pdfIn PDF document text
    • http://files.givingasha.org/uploads/1/3/1/3/131398372/winuxabozofur.pdfIn PDF document text
    • http://files.bnativeflutes.com/uploads/1/3/0/8/130814716/1472531.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/1/0430/3942/4669/files/76800861447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/pegelisavin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/80510133448.pdfIn PDF document text
    • https://rawosevatati.files.wordpress.com/2020/06/88910903795.pdfIn PDF document text
    • https://sunokowezepe.files.wordpress.com/2020/06/9319100145.pdfIn PDF document text
    • https://tazuxejewifi.files.wordpress.com/2020/06/96760729429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/pagitilawujatubafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/mawibixazig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/42190319540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/80224420112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/89050431468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6371/3690/files/selew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4265/1805/files/21121763773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/17405229903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.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 5

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_off000066a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 5212 bytes
SHA-256: e94159053301d6f1fa0ebd7713dee52e01bbe69b72e123b71f80c841c8a32557
font_01_sfnt_off00007824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7824 11512 bytes
SHA-256: 4f42a949bcac5b0175107f5e657e8ca9da326287e4b9eee6372ed7f0ccad9961

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