Malicious PDF — malware analysis report

Static analysis result for SHA-256 0182c5fa7058e59c…

MALICIOUS

PDF

39.2 KB Created: 2020-10-26 05:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-08
MD5: b0142ca76e128b60e2b71a7c59ee5d0f SHA-1: 98c912eb1c79fcb7c5ad25ca108b5236d0185610 SHA-256: 0182c5fa7058e59cded91a7ad0f4d5bbc1e64c99d5b77445c000596c19fc50ba
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirector infrastructure like 'ggtraff.ru', and others to S3 buckets hosting further PDF files. This indicates a link farm and SEO poisoning tactic designed to lure victims into downloading potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/wb?keyword=manuales%20de%20procesos%20en%20informatica In PDF document text
    • https://s3.amazonaws.com/wilugugo/manorama_weekly_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/wumelovojarebofupopuw.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/mudowogopov.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/jumafigotunefe.pdfIn PDF document text
    • https://xiletepegokif.weebly.com/uploads/1/3/4/3/134319576/d75b8457f8dd8.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/597ae6208332.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/nowuribinajefojavot.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/1a288a.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/7410543.pdfIn PDF document text
    • https://jiwamotezonadiw.weebly.com/uploads/1/3/4/3/134325797/9d30205.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005dfc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005dfc.bin)
    • https://cdn.shopify.com/s/files/1/0268/7752/6186/files/76543000748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8508/2008/files/repair_a_corrupted_file_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9251/8057/files/63476547061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/48776855394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b516e6f9-28e3-435b-99bf-06dd69bcbeee/bmw_m50_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dedca4f-c648-4a19-82b6-ee1b08c002c4/57877432639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3903/0439/files/solicitation_letter_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/sujiniv.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 extracted file (font_00_sfnt_off00005dfc.bin)

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_off00005dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 5304 bytes
SHA-256: a2de31391d88bb10048757751721783b24b6bc422ab790a04a856a6a3241f404
font_01_sfnt_off00006fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 9212 bytes
SHA-256: de7af27f116839879d0a668b164ec8f04b2a5d72186d2ce85ad7dde96b90745f

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