Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b3cb52ea32d2e2…

MALICIOUS

PDF

47.4 KB Created: 2020-07-30 17:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc8bafafff2c6f79c772d314b71caab6 SHA-1: 80dcc849d75d1dc1308cf059bb5c789f62ba6a24 SHA-256: c1b3cb52ea32d2e27da5872a344123d3e7ff8dd8b3510f85496e9c202770fe9a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to mimic a book title, suggesting a lure. The presence of a PDF link farm heuristic further indicates malicious intent, likely to drive traffic to malicious sites or distribute further payloads.

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=barron+s+ap+psychology+book+pdf In PDF document text
    • http://files.gwrra-iowa.com/uploads/1/3/1/3/131380849/zuwejasadiwer.pdfIn PDF document text
    • http://files.awakenemerge.com/uploads/1/3/1/4/131453249/950f928b2.pdfIn PDF document text
    • http://files.spanish.thelanguagehub.net/uploads/1/3/0/7/130740465/1497352.pdfIn PDF document text
    • http://files.focused-fitness.com/uploads/1/3/0/8/130873708/novuxaforisosa_zukovagaxe.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/1/0432/0421/4942/files/45083310128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/vorebap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/juboxafaduduba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fexofedome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/77084380157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/wabaxani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/10911506315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/garamadekazigipiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/33724959121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2916/files/89510090967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.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_off00007b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 5316 bytes
SHA-256: 972859a951288654f9026364c5c4b89bf856f93973369fb81ba60cdd9b58f1ca
font_01_sfnt_off00008d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D76 10488 bytes
SHA-256: 07e18926d0741eefabf37a9edcd3d5943dbe128be8554c21ce536f775ffe5367

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