Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81f61b70a83416d…

MALICIOUS

PDF

60.8 KB Created: 2020-07-28 08:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d50d3f6ab094054c0249406b79445d7 SHA-1: 791441fdd9bbdea1a50035f43cdbd4dbb5a16120 SHA-256: e81f61b70a83416d25d83a4da80e1dbbfee588865b8d11612d077c9554af5155
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, suggests a theme of 'social media platforms and their uses', likely a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=social+media+platforms+and+their+uses In PDF document text
    • http://files.ontheroadwithpayal.com/uploads/1/3/1/4/131409861/bukivaruritibes.pdfIn PDF document text
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdfIn PDF document text
    • http://files.arizonastartales.com/uploads/1/3/0/7/130776561/lajoran_sexejupenevenif_rasuwot_jobanane.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/1/0431/2170/5124/files/jelivugubopawavemasemar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/89621967749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/tozepuxurixezawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/lodudoreguwafigudujota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/rejuxibuwezidavamozusase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/lakere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/sawaniwuzumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/30906313225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/62376389622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/57633936826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/naweboximogajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/87984615128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/kaguvokisigezisedekifo.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_off0000a76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA76C 5380 bytes
SHA-256: 58a3abf650d5c8c6db89fdec99bf0f914b19236e957602ff9019957ff283765e
font_01_sfnt_off0000b974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB974 14396 bytes
SHA-256: 3dcfd0d4048cb0f54185be9bb3a7c8630af050cb6d4057d695261ebefcfe7d30

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