Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0d00be70c99411…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 08:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccf3ad003cf06c0083f114ad7017f5d3 SHA-1: a4a2ce4c437f02b5bbcef66481baca5cedaad6de SHA-256: 7b0d00be70c9941194d494916819e47ca2eea1fc08e1eb8d77d5d3cb45048338
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, which is a common tactic for phishing and malware distribution. The primary redirector URL is 'https://ttraff.com/pify?keyword=textbook+of+biochemistry+with+clinical+correlations+pdf+free+download', which attempts to lure users with a fake free download. The ML classifier strongly indicated maliciousness, and the presence of multiple links to external PDFs suggests a link farm designed to drive traffic to malicious sites.

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=textbook+of+biochemistry+with+clinical+correlations+pdf+free+download In PDF document text
    • http://files.kimberlyenglish.com/uploads/1/3/1/4/131453174/kalulubalaguw.pdfIn PDF document text
    • http://files.christianabroughton.info/uploads/1/3/2/6/132680831/1349618.pdfIn PDF document text
    • http://files.topsaharatours.com/uploads/1/3/1/4/131453060/pofil.pdfIn PDF document text
    • http://files.thespeakerstore.co.uk/uploads/1/3/2/7/132740281/taxanorokatuw-vomupelix-vavireve-kugowibe.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/1/0432/4923/8184/files/lemijojon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/teribukasule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/befitexujepekitorinup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/oceans_hillsong_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/19603108333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/sosinobifeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/jizijoraderapisezew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/dopagujadurop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/11102053635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/laderakobag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/familia_unipersonal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/ampere_s_circuital_law_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5490/8071/files/dododogikumewinefaj.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 4

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_off00007389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 5808 bytes
SHA-256: 6f6fb7f5737e396fd045c0eb8ba1d70aa177999247d3fd34e174bf84da03d88e
font_01_sfnt_off00008743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8743 10120 bytes
SHA-256: af6e1bfa75384632b2665ff24640608de2fc15a583a320c3ba67920b65e7d189

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