Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b34e5d3a56c3f1a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 13:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ecd6824e9833a7ac11d35b68a3474634 SHA-1: f81e6e48ddd6f6bc21b8dfe498d5dbf6c2408490 SHA-256: 7b34e5d3a56c3f1ad9cbe37b15033fac836790b8c51418e8fda27e5fe7c9ec88
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to appear as a free download for a '2020 calendar printable pdf portrait'. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirector links and a link farm, suggesting a phishing or scam attempt. No scripts were extracted, but the embedded links are the primary vector for this attack.

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=2020+calendar+printable+pdf+portrait In PDF document text
    • http://files.baileysea.com/uploads/1/3/1/4/131454791/5580405.pdfIn PDF document text
    • http://vebur.smnoma.org/uploads/1/3/1/3/131383483/zojizur.pdfIn PDF document text
    • http://dupefalal.mondokdentalimplantsmexico.com/uploads/1/3/1/0/131070581/100438.pdfIn PDF document text
    • http://files.365transportation.com/uploads/1/3/1/4/131406520/9a3a9d816f7e.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/1/0429/4171/0499/files/fakibenuxinuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8151/3622/files/befasorob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/19082005547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0288/7322/files/zedaluga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/dabitefalajom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/51550059418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8692/1382/files/gtd_workflow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/43688141357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/nedejukiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/66832910357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/5244397296.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 4

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_off00006431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 5288 bytes
SHA-256: 809381784a31562a7fef5960a497950fa819349b443f46e34aedcbc13ba90cb5
font_01_sfnt_off00007630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 10328 bytes
SHA-256: 48775d679fc1601489c592edf3d6126c895479fc2070c02c8653af7603c46f7a

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