Malicious PDF — malware analysis report

Static analysis result for SHA-256 8297ee06c27c8cbe…

MALICIOUS

PDF

53.7 KB Created: 2020-07-21 10:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 7a53fd782b6d25d976b6a869ae474e3e SHA-1: c672df7f5e77fb91583dc48997614c00b69ac456 SHA-256: 8297ee06c27c8cbee5750e82c68fc44a475328925c863bae073694bbfce6006b
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, specifically targeting users with a "free download" lure. The primary redirector URL, https://ttraff.com/wb?keyword=pharmacovigilance%20books%20free%20download%20pdf, is used to funnel victims to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to deliver further malicious content, likely via a spearphishing attachment vector.

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.com/wb?keyword=pharmacovigilance%20books%20free%20download%20pdf In PDF document text
    • http://files.travelsbynancyteam.com/uploads/1/3/1/4/131454766/7054230.pdfIn PDF document text
    • http://files.summitsalesrecruiting.com/uploads/1/3/2/6/132681303/3252394.pdfIn PDF document text
    • http://files.edsolutionsofcharlotte.com/uploads/1/3/0/7/130775511/novoxugulemeli.pdfIn PDF document text
    • http://files.bsquareddesigns.net/uploads/1/3/1/6/131606201/migitetud_jufevifatupuga_nisadesew_futukiriji.pdfIn PDF document text
    • http://files.samikahn.com/uploads/1/3/1/1/131164350/lotutodifewet.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/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/65657524576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/32904875368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/90539646740.pdfIn PDF document text
    • https://fuwedibet.files.wordpress.com/2020/06/nibugitegupebifenegusege.pdfIn PDF document text
    • https://mowawosubi.files.wordpress.com/2020/06/vurufafude.pdfIn PDF document text
    • https://vavokoze.files.wordpress.com/2020/06/vusilakapejoduzetoputijeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/zojoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/zerop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/35158047090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/fekajemaxuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/nobegegukete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77603652905.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000928b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928B 5636 bytes
SHA-256: d98d4aa9d82a59ef4eb8ea6a4c24f988cbb12630d54eac4bcda3c9550b7d43e2
font_01_sfnt_off0000a58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA58C 10588 bytes
SHA-256: 56a991c7427c709972ffd6f4bd964cb91db438f1fbed9af2161793213181358d