Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc831a2714529d4…

MALICIOUS

PDF

51.0 KB Created: 2020-08-05 22:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f44263a35831b0eb52e7b61b0b36535 SHA-1: c72dddeb92e8e31263cc78f05dedf824544e6c69 SHA-256: 0bc831a2714529d4d52cf0eda3fc9c7229d0c9c0d9363016ba3c83f36973a3eb
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create a link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to lure users to malicious infrastructure, likely for phishing or malware distribution.

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.com/pify?keyword=estados+financieros+ejemplos+pdf In PDF document text
    • http://files.fafcookbook.com/uploads/1/3/0/7/130738871/gujeseporabe.pdfIn PDF document text
    • http://files.seliasomething.com/uploads/1/3/1/3/131383737/4508014.pdfIn PDF document text
    • http://files.spanish-expressions.com/uploads/1/3/2/6/132682070/1674864.pdfIn PDF document text
    • http://nagar.nhcss.org/uploads/1/3/0/8/130814238/dabatepa-vixujejabufas.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/1/0438/0291/9074/files/nosuwujujijusinalix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/fadejosefezavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/parental_attitude_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/52583168123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/3dcrafter_3d_modeling_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/90595163342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/7597023816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2079/6583/files/pefitotamanebepogivapixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3698/9850/files/xogoxagujip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/98325981697.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_off0000850e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850E 5336 bytes
SHA-256: 0461da32a36ee9181c8c475a2c7d355ba8c4c72a8051fd4527d2b7e808ca7393
font_01_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 11756 bytes
SHA-256: 17bd4a9b086271455e7fa343e5e2eca42cc9847e3af034f58da5021570e17cbb

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