Malicious PDF — malware analysis report

Static analysis result for SHA-256 58088d2426d6727e…

MALICIOUS

PDF

37.0 KB Created: 2020-08-23 18:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 373fa6e4342fbc74984e1ffb7ccd229d SHA-1: 80b2aa2319f7b64d923323b2d13d88af7dad735c SHA-256: 58088d2426d6727e551d0dc1e3f38f328f9c537e737f805f7b9685fcf01e41eb
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body text, though heavily obfuscated, contains keywords related to 'factoring trinomials worksheet' and a URL that appears to be part of an SEO poisoning campaign. The ML classifier strongly indicates maliciousness.

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=factoring+trinomials+worksheet+with+answers+algebra+1 In PDF document text
    • http://files.modebylauren.com/uploads/1/3/1/4/131437615/fokijilefelotebaru.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/1/0432/3672/0808/files/norude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/21300386663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/45788656574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/9999088095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/pofotuxuwegedanafunovab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1327/5554/files/motorcycle_hire_purchase_agreement_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/c_namevaluecollection_to_querystring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2396/8919/files/95404793483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/trumpet_solo_pieces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/92721385260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/zobamawalubatujelirubamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/nelafodoxator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7271/4920/files/dollar_robber_rappy_mcrapperson.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 3

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_off00005212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5212 5516 bytes
SHA-256: e1aaceb1367bc4a1efa02ccfa516c59f04777913e341c91f7f9d2b8e3d35c43d
font_01_sfnt_off000064bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 9976 bytes
SHA-256: e612e701de124cb374cc7ea206ed88e0bf6ac5f1e6a82fbc8f2da94dabdd31d3

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