Malicious PDF — malware analysis report

Static analysis result for SHA-256 186007428d2deb82…

MALICIOUS

PDF

42.7 KB Created: 2020-07-23 21:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: da700822ef2b07ceb049d41263a36eff SHA-1: a85bf4d027d27380e17f75bb7122a823e9460cbd SHA-256: 186007428d2deb825733a1ba20d77eebaf3733a1c49a7233747ea3132c34b918
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its use of redirector links pointing to known malicious infrastructure, specifically 'ttraff.com'. It also employs a link farm strategy, embedding numerous external PDF links, many hosted on Shopify, to potentially obscure malicious intent. The ML classifier strongly supports the malicious verdict.

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=pdf%20merge%20utility%20java In PDF document text
    • http://files.sanjoseexpress.org/uploads/1/3/1/3/131398046/7719881.pdfIn PDF document text
    • http://files.meghanfoleyyoga.com/uploads/1/3/1/6/131637409/nowax.pdfIn PDF document text
    • http://files.teraflare.net/uploads/1/3/2/7/132740172/nanezuxetirurob.pdfIn PDF document text
    • http://files.thedymabase.com/uploads/1/3/1/8/131856456/5391518.pdfIn PDF document text
    • http://files.safna.com/uploads/1/3/1/4/131437953/3081309.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/1/0433/6913/6280/files/zuwedavulesifenuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sekokejeninidifowabofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/vojejijosukalutatupufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/1023343112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/fenewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/33155836503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/50354596927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/76770949859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/ragex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/58485460514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/dimamuxobibumokukoloxito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30899714004.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_off0000692b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692B 4952 bytes
SHA-256: 38420356a044f0417f521d2659458b3015a17ac637a4e350446f06f81ebcdddb
font_01_sfnt_off00007a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 10516 bytes
SHA-256: a78195079f92d63335094f94f93ad0bc4e5a8dc959170a68fb4eb3dcc18c9c37

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