Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d5bc5860ec8b0f…

MALICIOUS

PDF

65.8 KB Created: 2020-08-18 18:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a240df6075566e62d5d877274092f0d SHA-1: 98035f6d9d6708e91ff939f8381461781d3d082e SHA-256: 71d5bc5860ec8b0f52f40450d41968d8cb04a327aa737b88eea7198783809621
294 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains numerous links to an SEO redirector infrastructure, which is designed to lure users into downloading files. The document body and heuristics indicate a lure for a free download, likely a password-protected archive, and impersonates cloud document services. The embedded URLs point to known malicious redirectors and a large number of SEO-optimized PDF links, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.cc/pify?keyword=facebook+sdk+login+android In PDF document text
    • http://kijef.purplepoise.com/uploads/1/3/2/6/132696434/9407005.pdfIn PDF document text
    • http://dumavow.natashadardas.co.uk/uploads/1/3/1/3/131383837/7610251.pdfIn PDF document text
    • http://kalolopo.afkclothingcompany.com/uploads/1/3/0/7/130775164/lipoju.pdfIn PDF document text
    • http://files.soma-psiche.org/uploads/1/3/1/3/131398582/tutowibitoxagas.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/1/0431/6079/7333/files/love_hina_manga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/basopefaratotimilev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/90707602792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/mp3__the_beatles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/seconds_to_mins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/85873815684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/alpha_male_strategies_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/mitomuluvotoxasetomedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0115/1651/files/rimifebukufafepoveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/4903754987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/affairscloud_current_affairs_weekly_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB752 5264 bytes
SHA-256: 5e39c022cec9b7b17da3f925674c9070fbd28faa88c0d01f474a81e637e73f90
font_01_sfnt_off0000c93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93B 15736 bytes
SHA-256: c955d9856fe134c72d5ba2f13b84e33082a642b6803e6f7bc2d0c8c4a3875b0a