Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b838cf628a56af…

MALICIOUS

PDF

47.8 KB Created: 2020-08-09 11:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 572c3749c4827c6e5d0911fdef2d5f99 SHA-1: d3e09842781252d3729a461d5c0462945460c602 SHA-256: 86b838cf628a56af08c03d1699dcb611d8bd3d02c71649ec992353d622e31640
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM" and "PDF_MALICIOUS_REDIRECTOR_LINK". The primary redirector URL is https://ttraff.ru/pify?keyword=bsl+alphabet+pdf, which is used to obscure the true destination of the links. The document body and metadata suggest a lure related to "Bsl alphabet pdf" and was generated by wkhtmltopdf, indicating a likely phishing or scam attempt.

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=bsl+alphabet+pdf In PDF document text
    • http://sekata.genawave.com/uploads/1/3/1/3/131384429/05749a3ce.pdfIn PDF document text
    • http://wejujekas.hammercan.com/uploads/1/3/1/3/131380429/7735198.pdfIn PDF document text
    • http://files.annegreenwood.net/uploads/1/3/1/4/131413678/nexemekero-tasaxasinumer.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/1/0430/7006/2754/files/33608872965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/vimowokatuzusetisalizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/6157172400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/36408521933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/lujaxax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1260/1502/files/69957486341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/89770718249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/ccat_test_grade_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/94786279879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/dwm_notification_window.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
🗂 Part of campaign: pierrepaulbitton.net 5 samples

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_off00007d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 5224 bytes
SHA-256: ced6a0fbbccebe73864c2e46db07b2308a94ade516ead0f364cd9e2f083cd485
font_01_sfnt_off00008f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F49 10304 bytes
SHA-256: 519b50a199dc5f31748151379254d84044b24f7db68698a9716e5f9819a6cd99

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