Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ae95c3de493fcd…

MALICIOUS

PDF

40.4 KB Created: 2020-07-21 04:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 2db46dc3fe02a026dd5444e6834d45ba SHA-1: 2c8610a3c187e3d084729c208e92a4ee03a8eb35 SHA-256: 87ae95c3de493fcdd93e3f2b4cbab2b55020970c24fd0caf838deab76338159e
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to redirect users to external content, masquerading as technical documentation. The primary redirector URL, 'https://ttraff.cc/wb?keyword=mitsubishi%20worm%20gear%20reducer%20pdf', is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Mitsubishi worm gear reducer pdf'. The presence of many external links and a malicious redirector indicates an attempt to distribute further malicious content or phish for information.

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=mitsubishi%20worm%20gear%20reducer%20pdf In PDF document text
    • http://files.friendsofparkswf.com/uploads/1/3/0/7/130776714/roxedopakif.pdfIn PDF document text
    • http://files.almutalbrecht.com/uploads/1/3/0/9/130969874/3732813.pdfIn PDF document text
    • http://files.treeoflifeanglican.org/uploads/1/3/2/8/132814342/f630d7.pdfIn PDF document text
    • http://files.sweetnspicecandles.ca/uploads/1/3/2/7/132710676/9273107.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/1/0433/4023/4902/files/65600750729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/palura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/81663150378.pdfIn PDF document text
    • https://zenusunadaxo.files.wordpress.com/2020/06/18438122438.pdfIn PDF document text
    • https://jifebavos.files.wordpress.com/2020/07/57266956333.pdfIn PDF document text
    • https://zodudawizif.files.wordpress.com/2020/06/26936086716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/xiwulonobab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/23403667575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/getuxunug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/11141874676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/kifukelisinopef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/pikapofujap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/69423874290.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 7

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_off00005ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 5552 bytes
SHA-256: 18f49f95cb25a8a28bdeec35459faef219c505b67c612cb865d98167535a5cef
font_01_sfnt_off000072e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E6 9856 bytes
SHA-256: 880d693c6fd88ea97ef4101ca12a667d16f3511f9b5b40823a356888c4497846

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