Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2178d2b04f968f6…

MALICIOUS

PDF

33.5 KB Created: 2020-08-19 00:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37de10e1821e681e41842478c12fdb3a SHA-1: 57e32acbda33f55899efae732def0f3b8478e9ff SHA-256: c2178d2b04f968f667754302eb7de86ac6a0013a440cfe6cb514979141d57207
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a redirector. This indicates a likely attempt to drive traffic to malicious sites, possibly for phishing or malware distribution. No scripts were extracted, and the primary malicious activity is the link farm.

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=bilinear+transformation+definition+in+maths In PDF document text
    • http://files.passport2pain.com/uploads/1/3/0/7/130738701/kerigidixobu-tokumurupoj-jofamabum.pdfIn PDF document text
    • http://files.mkquilts.com/uploads/1/3/1/4/131408439/lizigukoxo.pdfIn PDF document text
    • http://files.hapasolutions.com/uploads/1/3/1/3/131398449/4ad02270e.pdfIn PDF document text
    • http://files.unalomesoapscandles.net/uploads/1/3/1/3/131379946/fenopoj.pdfIn PDF document text
    • http://files.wrapitexpress.com/uploads/1/3/1/4/131438389/mojunubikiroda.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/1/0434/5207/2086/files/40896164695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/83569682782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/11987648716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/jose_maria_arguedas_mitos_leyendas_y_cuentos_peruanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4349/4815/files/15301287630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/18253907635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/13528528549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4411/8434/files/candle_in_the_wind_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/zamofumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4948/3420/files/how_to_upgrade_chrome.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_off000045d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D5 5196 bytes
SHA-256: 5396b9ec71604416b8ba1662099238d01c2b60aa1697f16a743ee43d2ce2ddf3
font_01_sfnt_off00005744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5744 9888 bytes
SHA-256: 31b20a793345f99a12bbc1e2e1b796814285e6f7f35fcefee0c4a8c75dc694a9

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