Malicious PDF — malware analysis report

Static analysis result for SHA-256 37979278c9b2f9d5…

MALICIOUS

PDF

43.2 KB Created: 2020-09-05 01:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2013a9d2cdca17a5b106965c0a35a7ab SHA-1: bb9d1e39682d30cd310a6bb1f4a02bdbaaf51c03 SHA-256: 37979278c9b2f9d5dc3a0201930fc5a800c1b4e58679f2f8c97c567b04893046
154 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 lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, further supporting a malicious intent.

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/wix?keyword=nuisance+calls+report+uk
    • https://cdn.shopify.com/s/files/1/0435/6407/3128/files/pemex_business_plan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/namil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/tutuzafimebajapovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/mufeluzusijadum.pdf
    • https://cdn.shopify.com/s/files/1/0439/9933/0462/files/61881088624.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/rapamaxedobe.pdf
    • https://cdn.shopify.com/s/files/1/0454/9804/0472/files/can_you_feel_the_love_tonight_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0433/4403/5993/files/adb_fastboot_tool_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/stream_music_from_windows_10_to_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/gwyndolin_dark_souls_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/kilatorixepib.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/casqueamento_de_bovinos.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_b71ec10c20bd4de78dcd1750f9a198f3.pdf
    • https://static.usrfiles.com/ugd/2e16aa_50e41961068d4e009eebacbe1e85ca7a.pdf
    • https://static.usrfiles.com/ugd/16a96a_1404c7aa9aa744e1a5bf6b47b7db3ad3.pdf
    • https://static.usrfiles.com/ugd/cd79e3_705eb725ac994b619b57c74b3ec63b95.pdf
    • https://static.usrfiles.com/ugd/3fc21f_f3a46d3ee61d4deb888ba863b86f65fe.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_off00006dff.bin
4583ab1c26da21e11e9cccf773e1c66f071dd760bf58cb96fe79d327f54cf790
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 4960 bytes
font_01_sfnt_off00007ef2.bin
5d78eb0a9698c7f7900c76be55fc51f7c5ca6fe1cdf0cd69ca049f1e1e0684e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF2 9624 bytes