Malicious PDF — malware analysis report

Static analysis result for SHA-256 9038511e3ab2c99b…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 11:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1ff944b323678bb4e20d5adf3e968ac SHA-1: dbc897f4719e9efee2aa92776f9dabd6edad7864 SHA-256: 9038511e3ab2c99bbd45a7d97a944849a0789be2490d01a627db5a41eee815f3
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text suggesting a lure related to interview questions and a download. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate its use in a link farm designed to redirect users to potentially harmful content.

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.cc/pify?keyword=analytical+method+validation+interview+questions+pdf In PDF document text
    • http://files.nataliecanderson.com/uploads/1/3/0/8/130813866/3c5e88a0d.pdfIn PDF document text
    • http://files.irisrabines.com/uploads/1/3/1/4/131438348/vexuwetomojizu.pdfIn PDF document text
    • http://files.rileytimmermusic.com/uploads/1/3/0/8/130814129/1979006.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/1/0433/8037/5704/files/7212522724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/luretamavaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/mebadavoxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7517/3528/files/13543506627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/6466936208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/intro_to_the_design_and_analysis_of_algorithms_levitin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4273/3208/files/ragabogawigozogexajexut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/43821950023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/55995342795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/factors_determining_price_elasticity_of_demand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/femidifivadufagimub.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 6

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_off00007a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 5764 bytes
SHA-256: eda035f60c73b42c4bf86157d75f2c5f975c2424445c875ab8532792e5cd1b88
font_01_sfnt_off00008e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E00 10292 bytes
SHA-256: 449526fa02429e58648b1a136d2a67fec851510eaf475da428b4ab01d75da48d

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