Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f5b4149d59f787…

MALICIOUS

PDF

44.3 KB Created: 2020-08-05 16:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d1739988f7c1774836387355fefacc5 SHA-1: 8d26ca6ad28c3dc772fd0fbc851f3954d4b5a877 SHA-256: 87f5b4149d59f787735d6931dee4084f0d51a25db90bb40e4d59b4a6b15445e7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector infrastructure known for malicious activity. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a lure for users to download content. This pattern suggests an attempt to redirect users to malicious sites, likely for further exploitation or phishing.

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=al+anon+twelve+steps+and+twelve+traditions+pdf In PDF document text
    • http://derasa.riccifit.com/uploads/1/3/0/7/130776208/d986d22c78.pdfIn PDF document text
    • http://suxob.goalfitnessactivewear.com/uploads/1/3/1/8/131872225/datizilusojudek_begudid_xinogu.pdfIn PDF document text
    • http://files.pscandi.com/uploads/1/3/1/3/131380258/bifoposekokam.pdfIn PDF document text
    • http://files.distinctiveautomotivesales.com/uploads/1/3/2/6/132681443/mifimobebexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/nokufojuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/bujujufofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/lemedoriluna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/gukutetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/hulu_account_checker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/evangelismo_elena_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6788/1125/files/baxenojotezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/woxavikesurulaluvofozetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/71158969441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/wexumodagoneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/difference_between_c_and_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9492/4700/files/54858040498.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000627e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627E 4964 bytes
SHA-256: da5e6904de89b30ece4466a3c7050785473960d4e748ee3d2f207b7014bb7376
font_01_sfnt_off0000737c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 10460 bytes
SHA-256: 9a897f72fbf85a6541c7733ca67f5d4100fd9ff599ed972f9c31618d6aadea2f
font_02_sfnt_off000095c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c