Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c21a7c82d29e29…

MALICIOUS

PDF

43.6 KB Created: 2020-08-23 17:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 996f3b9af44d169c002f126c0f32df2b SHA-1: 18c762f592c8403b9e32fdf30cdfa1b0714eebe7 SHA-256: b6c21a7c82d29e29aa539755e653a39b798757336d87b61915cc2791ca416e52
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Aplikasi avidemux for pc' and the malicious URL, suggesting a lure to a malicious site. The presence of numerous PDF links, including one to a redirector, indicates a likely attempt to drive traffic to malicious infrastructure.

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.cc/pify?keyword=aplikasi+avidemux+for+pc In PDF document text
    • http://vobikor.thelabclan.com/uploads/1/3/1/4/131414661/lapedorupe.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/1/0460/1482/4607/files/cheque_deposit_form_hdfc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/free_christmas_coloring_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/rajof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/sedopirovufanidasusutuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/87936535192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6181/3152/files/hashflare_reinvest_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/1424371014.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_off00006b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B56 5484 bytes
SHA-256: 3153c285defa4c51ac46de59b44d37bc2e24bbbcb36acbd501d628239ac9f820
font_01_sfnt_off00007de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE7 10680 bytes
SHA-256: f387daba942299b33e94f9eb8ba8203d28d770c905963c9a642cf1e6af7cfaa0

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