Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dec583afe55b23…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 02:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f46063aa59f6043419e2a62dd5b4116b SHA-1: 66327fcfbe66167b2c1a9d04527f7f227ad4308d SHA-256: 20dec583afe55b23f2c2fa6462e3dc4484989e8e602c7061c3eaf241aad20db9
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, appears to contain text related to downloading software, and the presence of a 'download button' heuristic further supports a lure-based attack. The primary goal seems to be redirecting the user to malicious infrastructure to initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=utorrent+pro+android+apk+free In PDF document text
    • http://vimeli.thebarkingcatllc.com/uploads/1/3/2/7/132741066/1644830.pdfIn PDF document text
    • http://files.elitetempobasketball.com/uploads/1/3/1/4/131453276/e6743137304.pdfIn PDF document text
    • http://files.rq3llc.com/uploads/1/3/2/7/132712040/e45efb931cf.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/1/0437/0923/5355/files/xavameximopanigen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/rixamojatutiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7930/6135/files/49285221145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/geraje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/astronomie_einfhrung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/palewapurodazoxuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/suberidizotokepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8656/7841/files/zekobeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/bejomelopozijakoxipasemo.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 2

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_off00006e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 4880 bytes
SHA-256: 26b6b4b7fd7d9654e4edfd9baf1a54b1226979baf974880d737f55e5e0da67ee
font_01_sfnt_off00007f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3B 10296 bytes
SHA-256: 69647591e629fc0af61f110545e41b2cf737b070db72299267422b53d3852f0b

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