Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ff25b705c633aa…

MALICIOUS

PDF

50.1 KB Created: 2020-08-18 15:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f654d9a774c60e246bfd75623a55f7aa SHA-1: b980c95beb98e08ffabb69bbfdd28bc203c05c8e SHA-256: 20ff25b705c633aa06d459796da1b0e98aa1f14ab022d75fa36c9655c8369403
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One prominent link redirects to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Poe incursion league guide', suggesting a lure to attract users interested in gaming. The ML classifier strongly indicated 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.com/pify?keyword=poe+incursion+league+guide In PDF document text
    • http://files.northlandrentalhomes.com/uploads/1/3/0/7/130740055/gavasoxumewol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6119/9526/files/calculus_for_the_life_sciences_bittinger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/vijeloxexarupofuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1314/files/free_python_3._7_64_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8998/4678/files/calligraphy_fonts_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/bsf_bharti_form_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/76914911303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/carl_jung_interpretation_of_dreams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/steelcase_flex_spec_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/47156283881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/45245720664.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CD 4908 bytes
SHA-256: 5aa6d17ac7a630727138ecd9db654858ac61459e233102a4a47b579dadc497d5
font_01_sfnt_off00008a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 10420 bytes
SHA-256: 4967d09fc0de0713b86d35a5890502e706a2d0d8386b4ec41b8c78b9e3db0c59
font_02_sfnt_off0000adc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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