Malicious PDF — malware analysis report

Static analysis result for SHA-256 8998b904e0be2d0b…

MALICIOUS

PDF

52.7 KB Created: 2020-08-05 02:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 062c4f7f82dec5455e57e8728399d700 SHA-1: 161ec515401c7d34af599fa5ccff07d7e7208045 SHA-256: 8998b904e0be2d0b88e828f9a077fff6da9e52b7d1c3a295a3b74402e8fc6a56
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, also contains the same redirector URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also 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.cc/pify?keyword=anencefalia+fetal+pdf In PDF document text
    • http://files.qixingtanglang.com/uploads/1/3/2/6/132681294/gijiminamile.pdfIn PDF document text
    • http://files.ddrainbow.com/uploads/1/3/1/6/131637483/ludexekuka.pdfIn PDF document text
    • http://files.stjohnlutheranchurch.com/uploads/1/3/1/4/131453060/wodum-xozofer.pdfIn PDF document text
    • http://files.northlincsbeekeepers.org.uk/uploads/1/3/2/7/132710787/8653750.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/1/0428/6971/9196/files/73497369779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/phylum_chordata_notes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/9042253345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1811/6510/files/dorirasiwitewulogexixajip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/25388756703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/microeconomics_hubbard_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/32774957130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/dokevatusogetix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6258/3711/files/71103689154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/meiosis_worksheet_answers_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/jakozubizitoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/essentials_of_mis_11th_edition.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_off0000912d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912D 4864 bytes
SHA-256: 77729babe0e04ae83761f3384abfd50cd199ea28e993b148c6f89684276f795a
font_01_sfnt_off0000a1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D9 10676 bytes
SHA-256: 31bb141ad6eb5040b4665661265786bbf346870fefe4a750b932131dc7e5d13a

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