Malicious PDF — malware analysis report

Static analysis result for SHA-256 142a38c4dfec8124…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 21:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ecf0cb9c2e2957969f95b190aa6f7cbb SHA-1: fc061a2e0af1ba8e7fc7d860ec67f02130007495 SHA-256: 142a38c4dfec81242fee6ba4630d69fe87e9c639f68377915500aa0360b0ecf4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to appear as a link farm for SEO purposes, with a primary redirector pointing to a malicious URL. The document body, though obfuscated, contains the primary malicious URL, indicating an attempt to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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=understanding+the+linux+kernel+bovet+pdf In PDF document text
    • http://files.globemarineservices.com/uploads/1/3/1/1/131164236/kazemetipovegemolep.pdfIn PDF document text
    • http://files.amypurcellart.net/uploads/1/3/1/8/131856602/pulekanuxaxosiw.pdfIn PDF document text
    • http://files.lvccpp.com/uploads/1/3/0/7/130738615/rugaromosivu-sapiraki-bavosesoje.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/1/0432/6896/4505/files/25539751656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5372/files/mopowolejumop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/lolesolemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/puvenixijosekorujelobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/gusaneruruzor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/4237041376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8420/8545/files/comcast_xfinity_channel_lineup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7765/4935/files/certificate_of_origin_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/72896251341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/vubizumawesafopodupazex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/dopugakebakax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/refevodizazudaxuwulepe.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_off00005e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 5624 bytes
SHA-256: 1662b36a55308820f9c1d2d3b613bcf1dd8bc448a56b7f49b247aabb0e81ae7e
font_01_sfnt_off00007129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7129 10040 bytes
SHA-256: bc3c38bbd74d82e22ab9bf1c5f30cc55020a3d855359491b3b2c3aebd5b020c0

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