Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29d095df1629ef5…

MALICIOUS

PDF

35.1 KB Created: 2020-08-09 06:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caeb8dcf0d60b37f0b9c7a1bde3f7ad4 SHA-1: 8dc336ac72cb042ab4968fc72ea7ec767ee20568 SHA-256: c29d095df1629ef5e2328b85014f1ecd365e1135c1eecab542ed82a1ae21855a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to lure users to a malicious site. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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=assembly+language+programming+made+clear+a+systemic+approach+pdf
    • http://xobewiso.miamigardensflcarpetcleaning.com/uploads/1/3/1/4/131437657/wemub.pdf
    • http://files.adamswellscrisiscenter.com/uploads/1/3/2/6/132681545/rusupakukojo_tusevu.pdf
    • http://ramovowo.spiritualandparanormalconnections.com/uploads/1/3/1/6/131607163/154653f.pdf
    • http://files.crestlinepto.com/uploads/1/3/0/8/130814535/756a758c.pdf
    • http://files.lewiswarburg.com/uploads/1/3/2/3/132303035/7539067.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/jogunene.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/goodreads_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/20645536701.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/75051047025.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/23339517622.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/54954559151.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/novena_de_navidad_tradicional_colombiana.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/dolifuzojux.pdf
    • https://cdn.shopify.com/s/files/1/0440/1990/8758/files/download_english_dictionary_file.pdf
    • https://cdn.shopify.com/s/files/1/0447/5496/0535/files/blumberg_positivo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/92589968585.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004871.bin
f15ef690da2fd500e3aac7aba068a20ae46643eb6f609e0b97de38f183b66252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4871 5800 bytes
font_01_sfnt_off00005c0b.bin
5553415b4f705cfcf5e50d7a302d5d0e27c5769ad2c89756733720b4fbe5f48d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0B 10244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.