Malicious PDF — malware analysis report

Static analysis result for SHA-256 71eff6c44532883c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 01:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7af0ea7c2ac1651f62e61137396803f SHA-1: 9e51f143bb3a66e8a0506a11e02736cd2375bd8c SHA-256: 71eff6c44532883c4b9010a52408cb0018fa0cc718add950e794775f4c2d39c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be an SEO link farm designed to host malicious content. One primary redirector URL, 'https://ttraff.com/pify?keyword=full+form+of+bams+in+medical+field', is flagged as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting a phishing or scam lure. 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.com/pify?keyword=full+form+of+bams+in+medical+field In PDF document text
    • http://files.myhomeimprovementcareer.com/uploads/1/3/0/7/130775659/fowatorelaxim-wuxupu-nerogivesonow.pdfIn PDF document text
    • http://fefix.gandjstarkey.co.uk/uploads/1/3/2/3/132303124/9590287.pdfIn PDF document text
    • http://files.marineconservationlab.org/uploads/1/3/1/3/131398504/zofinaketopisogafox.pdfIn PDF document text
    • http://wopumejov.childcareandsolutions.com/uploads/1/3/1/4/131453540/5654860.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/1/0462/2906/1783/files/motor_encoder_data_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/advanced_excel_vba_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/jovupedejokakul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/10327160240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/free_ethiopian_fiction_books_in_amharic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/48363995059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/wubemomuraredalowup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/iskcon_desire_tree_srimad_bhagavatam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2059/7923/files/69915019838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/hey_soul_sister_ukulele_chords.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 5

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_off00006a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A37 5260 bytes
SHA-256: 3ade1af09d88699bb03f49f67b2d62c3f16db99c470e7963834ae48659d4adf1
font_01_sfnt_off00007bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFD 10208 bytes
SHA-256: efcf7c184d9748e5ffb9fc0e34f62d537606fe14659591c18563a28084a4ec95

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