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)
MD5: 5a240df6075566e62d5d877274092f0d SHA-1: 98035f6d9d6708e91ff939f8381461781d3d082e SHA-256: 71d5bc5860ec8b0f52f40450d41968d8cb04a327aa737b88eea7198783809621
254 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body also contains instructions to copy/paste content, suggesting a lure for command execution or password handling for encrypted archives. The presence of many external links, including to Shopify, indicates a potential link farm or SEO manipulation tactic to obscure malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • 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
    • http://kijef.purplepoise.com/uploads/1/3/2/6/132696434/9407005.pdf
    • http://dumavow.natashadardas.co.uk/uploads/1/3/1/3/131383837/7610251.pdf
    • http://kalolopo.afkclothingcompany.com/uploads/1/3/0/7/130775164/lipoju.pdf
    • http://files.soma-psiche.org/uploads/1/3/1/3/131398582/tutowibitoxagas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/love_hina_manga.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/basopefaratotimilev.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/90707602792.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/mp3__the_beatles.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/seconds_to_mins.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/85873815684.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/alpha_male_strategies_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/mitomuluvotoxasetomedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0115/1651/files/rimifebukufafepoveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/4903754987.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/affairscloud_current_affairs_weekly_2020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

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

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