Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e7f59467bb85bb…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 09:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c188ee767e5816aa87b9570ec140a959 SHA-1: 5aed81b8674678965372cacf3dc5540393b32536 SHA-256: f8e7f59467bb85bb6049f90e1d4e1ca31a631bb5abf1bfced65091e9256ea022
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 external PDF files hosted on Shopify. One critical heuristic indicates a malicious redirector link, which is likely the primary attack vector. The document body, though partially corrupted, suggests a lure related to 'application letter format for ojt business administration' to entice users to click the malicious URL. No scripts were extracted from this sample.

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=application+letter+format+for+ojt+business+administration In PDF document text
    • http://files.thequayboddie.com/uploads/1/3/2/6/132680870/6198391641.pdfIn PDF document text
    • http://sutagi.babygurlcosmetics.com/uploads/1/3/0/7/130739845/8877570.pdfIn PDF document text
    • http://files.reedblocks.com/uploads/1/3/0/7/130739658/9356006.pdfIn PDF document text
    • http://vuzedi.sdsuzukiinstitute.com/uploads/1/3/0/7/130776031/geganukazumax.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/1/0432/7391/2488/files/75555842489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/vopegofawuninob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/vatubunukafewesil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2171/2034/files/black_female_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5931/4841/files/kamaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/programming_fundamentals_coursera_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/55340545441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3608/6172/files/class_9_biology_book_english_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4375/3879/files/midute.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_off00006822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 5504 bytes
SHA-256: e00a50e943bfa808aebcd938000af0832ac3fe0aeaad8be85951d03745d751d9
font_01_sfnt_off00007ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 13968 bytes
SHA-256: fb2d32af925573c52378704b4e766864eb5f2edc49192ffc05040d0fc9aa4bfe

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