Malicious PDF — malware analysis report

Static analysis result for SHA-256 0731b09242322c46…

MALICIOUS

PDF

43.9 KB Created: 2020-07-30 08:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 2b2a12eb7c0bb182d75a52b3dbf70f6e SHA-1: e43c65ada6db4119505bb1b3d80f5986b42ebaa1 SHA-256: 0731b09242322c46ea255d95e64373364c9ab0d8187d941344bb47a2f998f49a
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious SEO link farm, as indicated by multiple heuristic firings. The document body, though heavily obfuscated, contains text suggesting a lure related to 'French accordion music pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

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=french%20accordion%20music%20pdf In PDF document text
    • http://files.rebec2000.com/uploads/1/3/1/4/131409128/tekerujelovuz-tewukulusid-xinelewidabe-zatogebozosiwe.pdfIn PDF document text
    • http://files.cchoneybrook.org/uploads/1/3/0/8/130813770/zaredamivami.pdfIn PDF document text
    • http://files.cissoise.com/uploads/1/3/1/4/131408103/4021701.pdfIn PDF document text
    • http://files.aasca.org/uploads/1/3/2/6/132680986/b46292a632.pdfIn PDF document text
    • http://files.two-suitcases.com/uploads/1/3/1/4/131407944/gutoz.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/1/0430/1937/0659/files/85891655042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/fivixufukibupujodub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/19941920916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/80387786209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/bugifemurukuferutolize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8321/6549/files/jegujubigakuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/83809788288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/88291305469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/70766023436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/33682211813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/sawusurokero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/68535078282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5800/files/dogomelakexuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/79533392799.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_off00006e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 5120 bytes
SHA-256: b72d6553bd9411b0e93b0944b3064da04cb184d7153ad8e20cec61580f98e980
font_01_sfnt_off00007f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6A 10180 bytes
SHA-256: 72ec2e97fdfae518a7129acbd206787742994d4327bd538ccdc5f65c73502a42

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