Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a751e568d17fdea…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 06:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0adc3e6934634723708b9eaad85696a SHA-1: efbe482d67010ee4cd842d770dc9526b4ad1b57a SHA-256: 4a751e568d17fdeab27af872721ed500b1238d9334abdbaf5e38acbd9bd053b7
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains text referencing "Netflix app yearly limit" and the malicious URL, suggesting a phishing or scam lure. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be tricking the user into clicking the malicious redirector URL.

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=netflix+app+yearly++limit In PDF document text
    • http://files.godsgracehawaii.com/uploads/1/3/0/8/130874189/vojeguxuzep.pdfIn PDF document text
    • http://files.aliahjan.co.nz/uploads/1/3/1/4/131452949/zubub.pdfIn PDF document text
    • http://files.elleextensioncils.com/uploads/1/3/1/4/131453610/3728396.pdfIn PDF document text
    • http://files.northgeorgiacern.org/uploads/1/3/2/7/132710780/f64aac4bdc6.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/1/0430/2045/1997/files/99726946428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/the_barefoot_investor_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/89742171396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/rudesajilokewutudobad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/1321832290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6128/4757/files/long_445_tractor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/bogol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/8176844681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3399/1080/files/virtualbox_shared_folder_ubuntu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/kidesijavaxapidifow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/ranifomusesojozon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/18924333047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3013/files/bangsamoro_basic_law_disadvantages.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_off00004f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F52 5008 bytes
SHA-256: e2f981477ba190c972a7ef7988ac2446fc15a5d247c0584fa85d7479e90326bc
font_01_sfnt_off0000605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 9968 bytes
SHA-256: f4ea8f31d6883025ad9cb50b46cea68bce7c46fdeb9cbaa998a598ed78ace8c0

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