Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6766e03fca3404e…

MALICIOUS

PDF

70.2 KB Created: 2020-08-30 12:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c99af6a5fa09ef002ce6600c78a22ef SHA-1: 9001d5067a1881df797d2946565d314a7bf4cd67 SHA-256: c6766e03fca3404e4d5196055d56daffc2ac24fbfc80ef7943c934573fbe07e3
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, further supporting the malicious intent of directing users to external content. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious activity.

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/wix?keyword=%25D9%2583%25D9%258A%25D9%2581%25D9%258A%25D8%25A9+%25D8%25A5%25D9%2586%25D8%25B4%25D8%25A7%25D8%25A1+%25D8%25B9%25D9%2586%25D9%2588%25D8%25A7%25D9%2586+%25D8%25A8%25D8%25B1%25D9%258A%25D8%25AF+%25D8%25A5%25D9%2584%25D9%2583%25D8%25AA%25D8%25B1%25D9%2588%25D9%2586%25D9%258A+%25D8%25AC%25D8%25AF%25D9%258A%25D8%25AF
    • https://static.usrfiles.com/ugd/e1d12c_5f539c633dd54e2593c7cd1c9c5d2cfc.pdf
    • https://static.usrfiles.com/ugd/f4de5e_86b3ceec758e40d8841d57aa51879136.pdf
    • https://static.usrfiles.com/ugd/e1d12c_cb2052c0831e41a985f2089bedae960b.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/36413888417.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/modernidade_lC3ADquida_lelivros.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/62523477948.pdf
    • https://cdn.shopify.com/s/files/1/0439/2452/1128/files/devamatupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/juniper_2200_switch_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/12341971382.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/75666415693.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/4805977658.pdf
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/arteritis_temporal_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/bstc_model_paper_2020_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000d101.bin
415ccb31d849660855229e60c452b04245d2012459dd609f874cab21128af449
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD101 31500 bytes
font_00_sfnt_off0000868f.bin
0839d7670eb8be446f52832e8c720d0f625510ceeadeab5b1dd4203940110fb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x868F 4068 bytes
font_01_sfnt_off0000946d.bin
7ab3ba276d8da9e91023981d631d86b322c2b0e5694e388a21b2b0f6a78333c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x946D 18796 bytes
font_02_sfnt_off0000b23f.bin
cec2cf2b9424779b67cfc5027eac420f10b0af95dfa539237e59f7b6b3088ac6
pdf-font-stream PDF embedded font (sfnt) at offset 0xB23F 9000 bytes