Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01ad3dddd149c64…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 22:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f05d6a12261fa9d9a98a09de2a37a457 SHA-1: 7fa369daac69b396dc2b3b5b8b1bb049b69c96b5 SHA-256: d01ad3dddd149c646c3724aa2147ece5eeb49630a241470652007c149fa248b0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-ins T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a high number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious destination. The document body, though heavily obfuscated, contains the title 'Business proposal sample powerpoint presentation pdf' and the malicious URL, indicating a lure to redirect users to potentially harmful content.

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=business+proposal+sample+powerpoint+presentation+pdf
    • http://gezewotor.franktownunitedmethodist.org/uploads/1/3/2/7/132741073/b9c4054f3.pdf
    • http://files.boomerangsandrings.com/uploads/1/3/0/7/130739450/dbb2d1b15ea22.pdf
    • https://cdn.shopify.com/s/files/1/0429/3636/9318/files/kinilarepojupidigipajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/vanilebotezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/abordagem_clssica_da_administrao.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/23483660332.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/rudram_kannada_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/ruvunutexikuroxuxepidok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/bhojpuri_chhath_geet_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/fe_to_rf_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/jidijan.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/19628679918.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/guwamafewutoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/sunopatimadokumijegip.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_off00006889.bin
2104f01bf348b1325eb336260b954e35d361cad9078015a6c1d9d76e16ed40c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6889 5328 bytes
font_01_sfnt_off00007a9c.bin
9d3baaea76427813e5034f32b0d168c53d87a8a4afaf653eb0677751a7773457
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9C 10164 bytes