Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adee50831a2c9f9…

MALICIOUS

PDF

47.5 KB Created: 2020-07-25 22:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: e605838a99d9d57d568fc7e50a24a9e6 SHA-1: 6f40f1a2ba5e2dbf927d2e0d0f2988fd9b8cb58c SHA-256: 7adee50831a2c9f99872c084670111b9b9a460f8c13685319644cfd504adaf2d
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links designed to redirect users to a link farm, masquerading as a download for an economics textbook. The primary redirector URL is identified as malicious. The ML classifier strongly indicates malicious intent, and the structure suggests a phishing or malware distribution lure.

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.cc/wb?keyword=economics%20book%20class%2010%20pdf In PDF document text
    • http://files.teamaudioeye.com/uploads/1/3/1/4/131406563/katujijuxo.pdfIn PDF document text
    • http://files.ccmooresville.com/uploads/1/3/1/4/131437056/munil_jorofuviraw_kavezovun_jedetuge.pdfIn PDF document text
    • http://files.welleyofficial.com/uploads/1/3/0/7/130740256/a02ee6c9c.pdfIn PDF document text
    • http://files.jorgedehoyos.com/uploads/1/3/2/7/132741144/01bb48bbaad.pdfIn PDF document text
    • http://files.pauseconnect.com/uploads/1/3/0/8/130814597/dazotiferalajer-surel-selomiriku.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/1/0430/6341/0845/files/73960733054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/44748815636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/59941388802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/jivokefiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/61030340195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/wikusukaliwesizojason.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2473/3592/files/64368195291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/22168299118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/68355556859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/xavokoxolozefojibemaxob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/setolazizemi.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 7

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_off00007d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 5152 bytes
SHA-256: f14b1404b41f2fae7c5c2e7e309f84f1085eda2eba299c3829bbb92e12570a52
font_01_sfnt_off00008e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E72 10076 bytes
SHA-256: aaaaa95827fea48bc6dd851137030f6f7b89452442f8d503395cbd1dc81a25d2

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