Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf884d54b94cc69…

MALICIOUS

PDF

39.6 KB Created: 2020-08-07 21:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cab3b5b8eabd204a76ec88c9df454b18 SHA-1: 816a415ea4a3e699f3565d59230751b88a16e75b SHA-256: 6bf884d54b94cc69d84b36f3d5ea58954757c45459fe975dc33cf186e409401b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many pointing to a redirector service at 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain text related to a 'calcium food chart pdf' lure, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector link confirms the intent to lead users to harmful content.

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.ru/pify?keyword=calcium+food+chart+pdf In PDF document text
    • http://files.artglassforumny.org/uploads/1/3/2/6/132682471/kilamodorutewa-zitaw-wisotibe-falanamegeza.pdfIn PDF document text
    • http://files.novaarchitecture.com/uploads/1/3/1/4/131483685/gijaxosibuz-saxazoxosinojo-vixorijorax.pdfIn PDF document text
    • http://files.nokomispl.org/uploads/1/3/0/8/130874526/6465306.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/1/0435/5080/2081/files/atlas_netter_editia_7_romana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/importance_de_l_alphabtisation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1353/0019/files/sedelika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/minecraft_shrinking_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/acuerdos_de_paz_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/69587739316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/52014935834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/galekezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5134/3269/files/zirebufujatebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/sasakolugesiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/56754073817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/83657030260.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_off00005dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC6 5124 bytes
SHA-256: 6fc6ccd76fca30bf7c71fea6b7e6fd70785a6c3d50165c913c80384ede128cae
font_01_sfnt_off00006f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F06 10176 bytes
SHA-256: 7d96432fd1c173e421ebd3e16422387c420cd229a5fcaf66b24c326a5fb9ee22

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