Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b772ae7a9f75f44…

MALICIOUS

PDF

42.4 KB Created: 2020-08-18 15:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06642dd7c37c5df4205e85d90bf83f44 SHA-1: a8ac3ef9498537d3b4d72d35d5deef6232e2e4b4 SHA-256: 3b772ae7a9f75f44aa286a4827d1014350cd12bd820ff1584bac9a1cf7e85d19
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.com/pify?keyword=sap+abap+tutorial+pdf'. This suggests a phishing or scam attempt, masquerading as a tutorial. The presence of many external links, including to Shopify domains, indicates a link farm strategy to potentially obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=sap+abap+tutorial+pdf
    • http://koluwa.kelseyskeys.com/uploads/1/3/0/7/130738511/binuge_ratazasawaxofi_rafowu.pdf
    • http://files.curiositycoffeebar.com/uploads/1/3/0/7/130776499/7062450.pdf
    • http://files.differencemakersfellowship.com/uploads/1/3/0/7/130775025/2504f.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/10083906402.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/88200054500.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/ashab_e_kahf_story_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/80675204182.pdf
    • https://cdn.shopify.com/s/files/1/0437/4609/9349/files/gepodusezil.pdf
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/71746513667.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/wii_virtual_console_wads_ntsc_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/nitiwezar.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/12114704453.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/sodiwakiz.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_off000068e8.bin
34c7377a124e17b60fe239593307110a213d43e5879c6febfee9a27ee222e1c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E8 5100 bytes
font_01_sfnt_off00007a41.bin
c846eee1d4c80a342f5cfe65a604d0d6bdb23eede3526d4179958d30aee69bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A41 10164 bytes

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