Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2a13f23c6a66eb…

MALICIOUS

PDF

39.8 KB Created: 2020-08-07 15:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3610c760457082f4ac15f7e18be54e88 SHA-1: d7e59924d261d587ab24a871db7daed96c6354bc SHA-256: 8a2a13f23c6a66ebe346abdf3c8e789599addf6c0b364733138dd59d7338c379
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, with the primary link pointing to a redirector service. This suggests a phishing or social engineering attack where the user is lured to a malicious site. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including one to a known malicious redirector, supports this assessment. No scripts were extracted from this sample.

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.ru/pify?keyword=australia+map+with+cities+pdf In PDF document text
    • http://files.maocorrea.com/uploads/1/3/1/4/131438823/6795867.pdfIn PDF document text
    • http://files.portsideatpanamacitybeach.com/uploads/1/3/0/8/130874379/9703973.pdfIn PDF document text
    • http://files.outdoor-electric.com/uploads/1/3/0/7/130739509/dewidopimifufaropi.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/1/0431/1243/1776/files/33072880222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5759/1960/files/44414993999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/weaver_leveling_guide_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/22947283017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0086/2619/files/mijozijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/lomupowuwuramibozotodolis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/60733630785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/73851493308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9229/5332/files/jatiwozoriloz.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_off00005d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 5476 bytes
SHA-256: 4927002cc5bdd6adb8cb383b0de2bfbee1a42c3d8dd3e952b88b8c5c26095a7e
font_01_sfnt_off00007000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 10188 bytes
SHA-256: 47dc9026a269f3ab4e38b9b4b1b1c2418e54eabbcfdab7635d88b3ce1e609e1d

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