Malicious PDF — malware analysis report

Static analysis result for SHA-256 07781ee9778f54a4…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 04:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1c34cf67ff71c6c4a34101de862f85 SHA-1: c39541a74b0db283ab74f87d0d9c459024bf5f64 SHA-256: 07781ee9778f54a493a2ee582c5ed61477179bccf632f3c42c415f33ac3f0199
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.cc', identified as malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or redirection tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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.cc/wix?keyword=sexy+chat+with+blanca
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/55192608514.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/62935725954.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/sezametejidadekidodad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/izuzu_pup_diesel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/topoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/bemafusewekipe.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_862c71b3958a469c994edf2a120ba8c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_849a8febcf734a0292e4c09faf8f00b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_043b9dae59e4418c92cfd24f96691e96.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbe58a705bf4e8587fa971a0c2e4071.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_off00005aec.bin
91f6e221ff2129b018a098735cac3629e9e7bec404d9f1fa7f7c62fa04320739
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEC 5120 bytes
font_01_sfnt_off00006c6a.bin
ee86dbed4819ae3af8f9370d715cdee7361d0d55a72a7da62654313af6b0cff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6A 10744 bytes