Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb491bdb4f7c12c…

MALICIOUS

PDF

50.1 KB Created: 2020-08-12 10:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 509c2ba901a01cfbf2296cc7f08f0ad7 SHA-1: 1fd5e6d3a780b6f4049a763c82c8867f7732f0b7 SHA-256: 0cb491bdb4f7c12cd87b0b1346281c554743272907763abde8f81dd6b0e8abd4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to external PDFs, and one specific link to a redirector. This suggests an attempt to manipulate search engine results or to host a large number of lures for phishing or malware distribution. The primary redirector URL is identified as 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=occupation+definition+pdf In PDF document text
    • http://maruvu.carinamarino.com/uploads/1/3/0/7/130740597/5096533.pdfIn PDF document text
    • http://xojuluzo.studentworshipcollective.com/uploads/1/3/0/7/130775934/xilulo.pdfIn PDF document text
    • http://files.chicagoland4x5.org/uploads/1/3/2/7/132710743/2643545.pdfIn PDF document text
    • http://tizixago.camplakeoutfitters.com/uploads/1/3/1/0/131070458/muzagosubipedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/gemisejadagesezef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1313/6799/files/vinugiwufojoluremenatiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/4850923116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/bazojixetumebofit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7700/8548/files/69150226172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4924/5079/files/voet_biochemistry_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/37539406714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/comment_assembler_des_sur_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/automobile_technology_n_k_giri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/sanovaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/7906768099.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 4868 bytes
SHA-256: 7b690082871db61f2570917886fd84c51521e133a423c9ce6b8e9d3f9ee68300
font_01_sfnt_off000079a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A8 6544 bytes
SHA-256: 6c01a180f368f57fca7b77f6f6ed36b8f0b93e5fc8518a3c60eaa908892f86e2
font_02_sfnt_off00008b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0A 15244 bytes
SHA-256: b09ecb013ff447df87dd489dfeee82ed66b5a7c2bf78132c30fa2a59c26209c2

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