Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d01846ef535a97…

MALICIOUS

PDF

44.4 KB Created: 2020-07-22 21:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: c25bf6aa997c7f552771901f82e8da19 SHA-1: 6c3dce5ff2cb7332939b9fb504fc06ebd64e0c27 SHA-256: 93d01846ef535a97e5c23e1a94a1ff3c7c88923614bd6d6c438f24b708b973b9
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a 'Devexpress manual pdf'. The link points to a known malicious redirector, which likely leads to further malicious content or exploits. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicates maliciousness.

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=devexpress%20manual%20pdf%20download In PDF document text
    • http://files.photos2rock2.com/uploads/1/3/1/6/131637679/7317358.pdfIn PDF document text
    • http://files.drleifrosenberger.com/uploads/1/3/1/4/131453623/fc938467.pdfIn PDF document text
    • http://files.lindabaldockphotography.com.au/uploads/1/3/0/7/130775145/5181ff70.pdfIn PDF document text
    • http://files.divinesoulenergy.com/uploads/1/3/0/9/130969819/d55ccdadbe3c.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/1/0429/3158/5180/files/75602913897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/kipenitibunibesasufugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/merof.pdfIn PDF document text
    • https://zozesikif.files.wordpress.com/2020/07/11769415279.pdfIn PDF document text
    • https://rogofuxeviso.files.wordpress.com/2020/06/57177075978.pdfIn PDF document text
    • https://jowoxub.files.wordpress.com/2020/07/9292290726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0731/9965/files/92506621640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/2681799814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/wajepinojokapigonegizame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/zurafufubaxotedazewidewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/lonevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5792/9622/files/virutikonubufofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4233/8981/files/gonudasetabafepol.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_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 5160 bytes
SHA-256: f2eda723a40a5fb8552cd8eb6ed4fa2083791d7d704a98bf9ee2577efde011eb
font_01_sfnt_off0000789b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 13752 bytes
SHA-256: 3f22a7430dc8b8823ddea1af4ca04b118c11254a56e4a35601625161bc1cc695

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