Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd19baa14b6696ad…

MALICIOUS

PDF

48.3 KB Created: 2020-07-26 01:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 91dea4c9b2b73d6dd146fff9f0fb6814 SHA-1: e73553497f3617fdfb58b2a3ee988136da52df7a SHA-256: fd19baa14b6696ad5e64f0b3c2a1f889c31b4b464654e2f9ad66fbe6664f8c3d
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, forming a link farm, with a critical heuristic identifying a malicious redirector. The primary malicious URL, ttraff.cc, is used to lure users to potentially harmful content. The ClamAV detection as 'Pdf.Dropper.Agent' further supports its malicious nature, suggesting it acts as a dropper for other malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-9524816-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9524816-0
  • 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=bos%20indicus%20y%20bos%20taurus%20pdf In PDF document text
    • http://files.seamnc.org/uploads/1/3/1/4/131437750/9261322.pdfIn PDF document text
    • http://files.littlesilverems.com/uploads/1/3/2/6/132682989/guguta.pdfIn PDF document text
    • http://files.woodburyspeclass.com/uploads/1/3/1/6/131607600/bovovagudiz.pdfIn PDF document text
    • http://files.hersheyblazetc.org/uploads/1/3/0/7/130738641/dinewosorajo-dudoxetaba-gadadadob-dewopik.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/1/0429/6635/2028/files/sokuzewusilasapiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/85555434467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/65291230260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/69348343221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4583/1324/files/8868898101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/53509321131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24413790208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/biwokajusej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/tuvanejavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/20175142613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/77492336668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/2014272219.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 8

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_off00007e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7A 5172 bytes
SHA-256: dc564ef5cf5ecddc0cd2ec7c73e7687fb2b9d5a6701eeb937a55829dc145046c
font_01_sfnt_off0000900c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900C 11008 bytes
SHA-256: f015ee00ae34a8b86e053ce244a472ca11fb2a7ac4caa6e633088834e645ed79

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