Malicious PDF — malware analysis report

Static analysis result for SHA-256 33be0ac6b7a91467…

MALICIOUS

PDF

44.3 KB Created: 2020-08-04 06:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c41734fcca5b77323cd092770e6328b2 SHA-1: 6e93a34520f9883f2520116f388fca66c7b2c429 SHA-256: 33be0ac6b7a91467a3e1fdd6fda648c012b49e35c8f9b07ad299cb33748761f6
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to obscure the true malicious destination. The ML classifier strongly supports the malicious nature of this PDF. The embedded links, particularly the one pointing to ttraff.ru, are the primary indicators of malicious intent, suggesting a phishing or malware distribution scheme.

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.ru/pify?keyword=amalan+gaya+hidup+sihat+pdf
    • http://files.deirdreedsign.com/uploads/1/3/2/6/132695569/tedujamoxuwiga_jelaruvixivop_mubigutolukaxu_bowosebopa.pdf
    • http://files.mxrkz.com/uploads/1/3/0/7/130739525/lagotugel.pdf
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdf
    • http://files.thinkgrafix.net/uploads/1/3/2/6/132681436/rijisosu.pdf
    • http://www.thailandtesol.com/stress-management-for-esl-and-efl-educators/What
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/food_inc_movie_sheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/fisez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/22211979897.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7963/files/wuduliferivadojevivawaweg.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/lunisoperidikodox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/7326598133.pdf
    • https://cdn.shopify.com/s/files/1/0432/2869/2643/files/bupafororetiwuxusatamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/96806939317.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/40459293561.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/retib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006321.bin
fde481f61dbc875abc2feb3253be8579d410608a1a0d4e15888deed457d40d99
pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 5104 bytes
font_01_sfnt_off00007445.bin
c3c1af9c177f3cf676af41d9d1db61bea3e6a461c47403ec05154dcb447a367a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7445 9896 bytes
font_02_sfnt_off00009615.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9615 4324 bytes