Malicious PDF — malware analysis report

Static analysis result for SHA-256 820e7a3a3fc9d898…

MALICIOUS

PDF

48.9 KB Created: 2020-08-27 18:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70f7e29f8a88820f638f3c666e297862 SHA-1: c3f1c496033730789cbb82bad58000bdf2b3137c SHA-256: 820e7a3a3fc9d898b2eaa8d7173e91e1e5534120b1fd4a0f4733e3a17b70a147
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying them as a link farm pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this lure. The ML classifier strongly indicates maliciousness, suggesting the primary goal is to redirect users to potentially harmful sites.

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.com/pify?keyword=44+pro+gloves+review In PDF document text
    • http://ferifam.cocktailsnponytails.com/uploads/1/3/2/8/132816066/4740956.pdfIn PDF document text
    • http://vobivufu.carolynbeckphotography.com/uploads/1/3/1/1/131164243/fidetipexi.pdfIn PDF document text
    • http://senijuza.lwhsphilanthropy.com/uploads/1/3/0/7/130775734/9b32b8f6a8a.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/1/0435/2232/6696/files/6886687526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/89187434749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4836/1375/files/vumekurezozesoriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/tijugegatabowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/xapetiwuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/benefits_of_speaking_in_tongues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/examenes_matrices_selectividad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/57184490156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89377355024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2813/1485/files/allen_test_papers_2017_jee.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_off00006c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C97 4920 bytes
SHA-256: 5d23e32f48f747ce86223e3aaee033db4166063138fe8ce6a9eaa7dfe573996e
font_01_sfnt_off00007d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D84 4564 bytes
SHA-256: 0539e0720dd82ca36974913cd203b8056b0860ac2f5b09ae26e65fbe774cece1
font_02_sfnt_off00008f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F54 10828 bytes
SHA-256: e01903fde83bd0ddfac60357e19b1280d97b83722efd40d0bd09aabc32e5cf93

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