Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6ee1328bff693a…

MALICIOUS

PDF

85.9 KB Created: 2020-10-31 13:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 101064f5c206e5c2086e368c6a79e0d1 SHA-1: 3daed9b8241778f7a8c8e478a982750187f037ed SHA-256: 1c6ee1328bff693a6c72f53145a46b65189d5823a5b03ff6fcc1c74b19651957
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lead users to a link farm for SEO-based phishing. The primary malicious URL identified is 'https://gettraff.ru/aws?keyword=muppet+with+big+mustache'. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to trick users into clicking through to malicious content, likely as a spearphishing attachment.

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://gettraff.ru/aws?keyword=muppet+with+big+mustache In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f9696224e04c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/70ad5f62-f050-40ec-a6e0-1af35f292926/12548831040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f6c675-8bed-46d3-8868-82960a07185d/32223554794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3754/4607/files/58258164941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6221/2781/files/documentum_dfs_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/mathematics_for_economists_carl_p._simon_lawrence_e._blume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7405/2798/files/gent_honeywell_fire_alarm_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/wobuximuxegutuxufan.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/kvs_admission_form_2018-_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1932/7429/files/free_unclaimed_money_washington_state.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3789/8924/files/femotakamusagiwiwole.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/absorcion_de_aminoacidos.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 5124 bytes
SHA-256: f4bdba8f3ee9227c6eb4db7e1d0b4bf12ce08f7a7ba14ad2bc3823d9be451aa2
font_01_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 11616 bytes
SHA-256: 96049143753e4afa21f973c4226e5d5addb64ca53b0fd028b118fd3b612f81e5
font_02_sfnt_off00013c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C68 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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