Malicious PDF — malware analysis report

Static analysis result for SHA-256 124ca68516dbafa1…

MALICIOUS

PDF

67.7 KB Created: 2020-08-30 15:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41cd0a3d120b93f3c50e874ed61ae416 SHA-1: ba6fbd2a17e602688c2b4e6b5b770f496632f6c6 SHA-256: 124ca68516dbafa181f19a03dd4780e3a93ae5b0048dab32031edd64cec15a1f
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as content about public relations techniques. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm used for SEO manipulation or malware distribution. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the overall structure point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/wix?keyword=90+tecnicas+de+relaciones+publicas+p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1526747ca75a40349b438c9bd8466d4b.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_5e67b339d57946569bf204a0a4443d5a.pdf
    • https://static.usrfiles.com/ugd/48f461_44dc3d9e872d4889be3c735e3bad3f1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb3e26e588d44a439b6545c18e965d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_84ee71002a7a480796b8404d892fec90.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/sovatogofelosobe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/lataxuzuxetofafa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/fabufodure.pdf
    • https://cdn.shopify.com/s/files/1/0433/2011/5358/files/89738625659.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/veluwezefivusigor.pdf
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/nazazumijenolosozunuximo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/vaste_song_audio_mp4.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_off0000cb1f.bin
5fb39b8354cd4a4515e3dfe34f6119651d706a1b79ee7e59f7865b37a8ed7632
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1F 5408 bytes
font_01_sfnt_off0000dd6f.bin
4492d5404b1cc5181594cb94b1e3c517c6bc2f9517149009b1919d04945da31e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6F 11248 bytes