Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05b33a8f4903221…

MALICIOUS

PDF

39.9 KB Created: 2020-09-01 22:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e875a178320798401ba6520719e6f5 SHA-1: 33c064cf5cc403091b629aff029886ad55b30607 SHA-256: c05b33a8f49032219b11a9e26434fd1ab777df1240141de780d3f68b2588c315
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a technique often used to obscure malicious destinations or to create SEO spam. One of the embedded URLs, https://ttraff.com/wix?keyword=salaam+rocky+bhai+song+status, is identified as a malicious redirector. The document body contains garbled text along with the malicious URL, suggesting it's a lure to drive traffic to the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

Heuristics 3

  • 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.
  • 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/wix?keyword=salaam+rocky+bhai+song+status
    • https://static.usrfiles.com/ugd/b98abb_cd7043e803a34eb18a6c7d5768736ab7.pdf
    • https://static.usrfiles.com/ugd/d5415a_55fb94cbb13a4a729b201eb0d5a90a8a.pdf
    • https://static.usrfiles.com/ugd/ca32a8_a093e8c9b0a643988a25248db4f106d8.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/tixojol.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6184/files/st_joe_bay_fishing_guides.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4317/files/gunotudojotiludeligazid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/netabedapopesumuluzosa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0252/6887/files/22431360173.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/instrucciones_de_amenemope.pdf
    • https://cdn.shopify.com/s/files/1/0429/9646/5823/files/nicomachean_ethics_david_ross.pdf
    • https://static.usrfiles.com/ugd/8acad3_d3f2569b874644499775794af58cfce6.pdf
    • https://static.usrfiles.com/ugd/dd4472_39293b42ed98443aaa10a21d10284bc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_bec52d215bef415bab6634e77357ab05.pdf
    • https://static.usrfiles.com/ugd/61f964_566f203ed157437e9fff8cd8dab1a7f0.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf3.bin
5ffaaebf22538723127c475cd3eef3f5d2b844b57d2f52ffc87e03c940d79021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF3 5620 bytes
font_01_sfnt_off00006eee.bin
26fb2fc621c2149f2eaab3923c49cbf7b73f1b011648779f81b930dfee1a6faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 14696 bytes

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