Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dc20b4dc233d60…

MALICIOUS

PDF

34.1 KB Created: 2020-08-18 19:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab730ef1d8bf6a77573de2ee85cd37d9 SHA-1: 3ca4f0c11c2271018717b4bf3213e19ce7d91e40 SHA-256: 00dc20b4dc233d603de70a6b594bf1fcecd42c7523d57213f467137a6650eac4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content. The document body text, though heavily obfuscated, includes the same URL, suggesting an attempt to disguise the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=new+odia+film+blackmail+all+songs
    • http://files.mychristianoccasion.com/uploads/1/3/0/7/130776082/1749389.pdf
    • http://wokogega.jonericschafer.com/uploads/1/3/1/0/131071164/mifizusuvegiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/62521742113.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/burket_s_oral_medicine_10th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4449/files/ranulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/zadedudebinug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/dezakowufikovudoxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/74625140946.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/golubofusidenodaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/2716897249.pdf
    • https://cdn.shopify.com/s/files/1/0432/9527/7214/files/7418095791.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/nizunepazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/wozatewimurekovukuwegab.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/lotek.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_off00004712.bin
0ceae51078576c325da71eab575c6b94cf2180172814693027388c2db4d0ae01
pdf-font-stream PDF embedded font (sfnt) at offset 0x4712 5508 bytes
font_01_sfnt_off000059db.bin
a4ec23d8ddaa9aa5f6ffc9691dca09f484be8910ddfe9c880eb57f4eeabec114
pdf-font-stream PDF embedded font (sfnt) at offset 0x59DB 9996 bytes