Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d519ace1f824469…

MALICIOUS

PDF

76.0 KB Created: 2020-07-24 09:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9911d00409e724b286c3273ceb7500b1 SHA-1: e763b58650264c642b399634e235b421ed304432 SHA-256: 1d519ace1f8244695059ac3dd9d255b444aa2df044b93534813177f1223e3c4b
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external resources, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text appears to be corrupted or obfuscated, but the presence of a URL related to 'mughal architecture' suggests a lure to entice users to click the malicious link.

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=ebba%20koch%20mughal%20architecture%20pdf In PDF document text
    • http://files.rosemontchoirs.com/uploads/1/3/2/7/132710753/c2bc526a927.pdfIn PDF document text
    • http://files.mindfulness-heidelberg.de/uploads/1/3/0/7/130739340/nozefadino.pdfIn PDF document text
    • http://files.xoforeverpics.com/uploads/1/3/2/7/132740958/risurapojadidopu.pdfIn PDF document text
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.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/1/0440/1207/7206/files/fufoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/sufafazaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/24769217089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/99370408067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/92581143237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bixebor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/sedakuwadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.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_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 5328 bytes
SHA-256: ff52a178bcf427209dd5d2c74cbe429a9ca6d93e8ad1b1c77dd3c920396f19cc
font_01_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 10488 bytes
SHA-256: 50b58b622dd6878d448a4ef183361830ad425ca2e161e8db5737d6665c64e88d

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