Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc39b204636836b…

MALICIOUS

PDF

48.8 KB Created: 2020-07-15 05:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 0fd71e2bbafddd6e4b3d6e6a29de5765 SHA-1: b2aef6fee7874b50f6e4daf9e76c9067d71d6d77 SHA-256: 5cc39b204636836b88994998713aadb80c57b34373a9c548392199fb64e07e0a
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.ru'. This suggests the document is part of a link farm or SEO manipulation scheme designed to lead users to malicious sites. The ML classifier strongly supports the malicious verdict.

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=cropping%20pattern%20definition%20pdf In PDF document text
    • http://files.phoenixassociates.com/uploads/1/3/1/4/131407761/ginaxopubakegofodave.pdfIn PDF document text
    • http://files.wholeyoats.com/uploads/1/3/0/7/130776673/4141290.pdfIn PDF document text
    • http://files.attotherapyus.com/uploads/1/3/0/7/130775150/kadiligavujozol_lexexevarukur_gowaxutixigix.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/1/0431/5663/5816/files/zuwovoxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/favubedezemopazejive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/89768126139.pdfIn PDF document text
    • https://dexuzonuluw.files.wordpress.com/2020/06/4171531093.pdfIn PDF document text
    • https://mifetaf234194639.files.wordpress.com/2020/07/sazazozojixikafeweve.pdfIn PDF document text
    • https://vutukutinom106189484.files.wordpress.com/2020/06/93828524742.pdfIn PDF document text
    • https://wemekuwi606608615.files.wordpress.com/2020/07/ledibifubaruzoporife.pdfIn PDF document text
    • https://wididoripelo.files.wordpress.com/2020/07/5126562723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4836/2399/files/jisibope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/dizajuriv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/68147103639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/81398091032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/lunavitovijivevipadowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/18168325659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/19336936590.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 3

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_off000081ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 4812 bytes
SHA-256: d789be96c08499c26ce3864d3d22c4c967baa84a028cd486576ba1da64d987f9
font_01_sfnt_off00009256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9256 10400 bytes
SHA-256: 28974ad393123a65a633c0a6704022f7c3efeff81b2534777da4bbb38e366419

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