Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ae866b6277e212…

MALICIOUS

PDF

43.7 KB Created: 2020-07-17 14:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5fd24425e3914a8319dbbd5751c9f2d7 SHA-1: 46eafc2230878da564ef36b69de9c64338aae0c5 SHA-256: 77ae866b6277e2124651439ae5c3900a88709bc5eb9feb2397c0022d160ae320
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, suggesting a link farm or phishing lure. The ML classifier also strongly indicates maliciousness. The document body contains keywords related to business processes, likely to appear legitimate.

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=ppap%20apqp%20fmea%20pdf In PDF document text
    • http://files.themetalheadbox.com/uploads/1/3/1/3/131380612/4630041.pdfIn PDF document text
    • http://files.mariabazzi.com/uploads/1/3/1/1/131164313/add789c5774.pdfIn PDF document text
    • http://files.beyondacademia4all.org/uploads/1/3/2/6/132682739/runek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://waxexuwifum.files.wordpress.com/2020/07/bofivedozebulefijokudisi.pdfIn PDF document text
    • https://regumawudabi.files.wordpress.com/2020/06/sevaxeke.pdfIn PDF document text
    • https://xatokorus.files.wordpress.com/2020/07/4867219771.pdfIn PDF document text
    • https://vavimanuda.files.wordpress.com/2020/07/vomigovaz.pdfIn PDF document text
    • https://bazugilaj.files.wordpress.com/2020/07/97977436605.pdfIn PDF document text
    • https://buromivuzam.files.wordpress.com/2020/07/67534737408.pdfIn PDF document text
    • https://fenetodigut.files.wordpress.com/2020/07/sobeso.pdfIn PDF document text
    • https://fojesezowivi.files.wordpress.com/2020/07/19773753130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/44455971638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/88102269991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/vuloduvametovizuzolepim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/tutikatuwojajimar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/gazedebelujezugubife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/sowelavowifumoson.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 2

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_off00006dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 4452 bytes
SHA-256: b65d89f0ed1d7818094db69b908eed8d256bbf8b6b854a646f30a22ddfb781c9
font_01_sfnt_off00007ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 10976 bytes
SHA-256: 7fb3e65478f53836de35b6179234bc2e4fed34134aea45b60b83197187b814f5

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