Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf89d8169da249c…

MALICIOUS

PDF

34.0 KB Created: 2020-09-08 19:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb321d5125e71b3c8ddad8aeccb72085 SHA-1: 70462586a57e0486fa5720644d51365a9f2dde66 SHA-256: cdf89d8169da249c111abbe7bf1b1675d1023a9e21c19d1f12a4a9883c7a6006
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is designed to lure victims to malicious content. The document body, though heavily obfuscated, contains the same URL and a list of other URLs hosted on cdn.shopify.com, likely as part of a link farm to improve SEO for malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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.club/pify?keyword=politikal+na+pakikilahok+grade+10+pdf
    • https://cdn.shopify.com/s/files/1/0434/1635/4977/files/pejovejawamapajoruf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/jidipituwor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/58861980932.pdf
    • https://cdn.shopify.com/s/files/1/0440/7492/6230/files/71731949206.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/hub_sports_1_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/63168494132.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/43993355226.pdf
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/98638452226.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/hopelessly_devoted_to_you_sheet_music.pdf
    • https://static.usrfiles.com/ugd/77941b_210c717c00714d24ba569f214b709817.pdf
    • https://static.usrfiles.com/ugd/b8c837_d746cacea8cd4c9a86ccd86b9cf76171.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_off00004681.bin
101aa7f7d06e8f621b5080079b8fe7f1b68768e6d08c9a7a789686727d201951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4681 5384 bytes
font_01_sfnt_off000058ce.bin
a20ce995d0ae283c421d3ba52a3e818156961a357fe0cf9cfd70680a4f521544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CE 9628 bytes

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