Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e2efc012e776b1…

MALICIOUS

PDF

42.1 KB Created: 2020-07-25 12:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 159b2983eaf26e1fed1860724c8527a2 SHA-1: 3a21c80c1c817f19bb9eea3d349b4ee582aa83ad SHA-256: 67e2efc012e776b1348800f1c111987d46d432d2a858458fe04e8e6db9e86670
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to service manuals. The primary malicious behavior observed is the use of a link farm and redirector to distribute other potentially malicious files.

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=moto%20guzzi%20v7%20classic%20service%20manual%20pdf In PDF document text
    • http://files.themilehighmacs.com/uploads/1/3/1/3/131384777/lorizobex.pdfIn PDF document text
    • http://files.amtboats.co.uk/uploads/1/3/2/6/132681993/6a1c63.pdfIn PDF document text
    • http://files.schumacherbrothersfencing.com/uploads/1/3/1/6/131637169/7855302.pdfIn PDF document text
    • http://files.grainsfamilymarket.com/uploads/1/3/0/7/130775647/tusar-kagenimatijukej.pdfIn PDF document text
    • http://files.zmagazine.co/uploads/1/3/2/6/132695602/debot.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/1/0431/3051/9716/files/bufonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/volifar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/21224129932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/mikotulegulawutaxorexewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/tedojoxira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/lubupuzesaravafebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/51737253579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/tezemepazaxurejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/rewilivowub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0129/0650/files/leluketipolakabitiraf.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_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 5552 bytes
SHA-256: 2dcb4c566342e686911669399e946fb7fcdc1e34f142c9401774df8011537eb1
font_01_sfnt_off000079ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 9700 bytes
SHA-256: 48f93c0e92657197f32c817fd0a572dcc0e87c11fc0f94697fe4559b3b6e14b8

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