Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55e1c525f09c9fa…

MALICIOUS

PDF

50.8 KB Created: 2020-08-15 01:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52737944c16f590466912727b79ef446 SHA-1: bfd1ba1b4d6373fc9a174547a951849e3f56e454 SHA-256: a55e1c525f09c9fa5cc6ecd88f506d47ecfed0835f1bd05b0ee3306484afdf76
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. This suggests a phishing or social engineering attempt to redirect the user to malicious content. The document body, though heavily obfuscated, contains URLs that are also present in the embedded link list, reinforcing the redirection attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wb?keyword=angular%20cli%20cheat%20sheet%20pdf
    • http://jesazijam.molecularbliss.com/uploads/1/3/1/4/131453501/xawilajafij_nibulofebuxade_gedegujudug_sogisesu.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/dennis_rainey_preparing_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/nomidasusopuro.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/i_want_candy_2007.pdf
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/ps_plus_4life_space.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/49808152266.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/52931229187.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/rujuvupidaguvedalolav.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/9166066993.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/endless_alleluia.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/58320195912.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/github_make_new_branch.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_off00006e0c.bin
1d51595fce01d6b9144a08388af812f2f70e6d57146c0e45063d943ae1923e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 5180 bytes
font_01_sfnt_off00007f9b.bin
0ab497317eed94440f9c21efa8d4a1716668ea1b1bc8ea3cbf4e651d6992a821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 14808 bytes
font_02_sfnt_off0000ae6c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6C 4324 bytes

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