Malicious PDF — malware analysis report

Static analysis result for SHA-256 69faa100155fcbff…

MALICIOUS

PDF

44.9 KB Created: 2020-08-20 04:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d961cd26a3fa3ee54c84d6cdd44b868 SHA-1: 1dd6b05e8d6512b07c71468a4b76b4048bf3a4ca SHA-256: 69faa100155fcbff4f2a48ff6586733c3847087dd4dcf40f36a3925b29c616ef
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for the redirector. The presence of numerous external PDF links, many pointing to potentially malicious or unknown domains, further supports the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.com/pify?keyword=chaplin+movie++in+english
    • http://nosipa.johnsaponaro.com/uploads/1/3/2/6/132696067/fegixujad.pdf
    • http://zutepe.vision-collective.com/uploads/1/3/0/7/130739640/pajiwugeneg.pdf
    • http://gopojudi.wcstructural.com/uploads/1/3/1/3/131398134/76f9fa5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/61085661686.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/42833603496.pdf
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/soccer_betting_tips_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8103/files/cdf_file_to_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/megibavesan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9811/9071/files/april_2020_current_affairs_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/28890214135.pdf
    • https://cdn.shopify.com/s/files/1/0459/9844/0605/files/i_drive_your_truck_piano_sheet_music.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_off000072fb.bin
70f0b0c5c8dbc1dca49299c37fb9a27686f9d40497f9b3535222a705bd320513
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FB 5100 bytes
font_01_sfnt_off0000843a.bin
cd62e01ebe2b0d62a77e09de6d2860f16fc5d1ef503c187c8679139d65ebe364
pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 10296 bytes