Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedf1e3155bc06cb…

MALICIOUS

PDF

58.4 KB Created: 2020-09-01 20:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93dd9bda94ddc786acbfb9aa0aa3d86d SHA-1: db4b333321984b1ebad8f1ec11971368ac76315b SHA-256: aedf1e3155bc06cb4cb94c0bac27dc3d2424164c0f8f376f8fa9ac98204d6853
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely for SEO poisoning or to obscure the final destination. The presence of a 'download button' lure further supports a malicious intent to trick the user into clicking the link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=instagram+psd+template+2018+free
    • https://static.usrfiles.com/ugd/e5cbe5_e6a7070cec3e4f368b682dc79247b11a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bec7bd20ef2441ba72da88219e6da27.pdf
    • https://static.usrfiles.com/ugd/49be48_7deb865d9b204f7a8d3ad44cbe58d311.pdf
    • https://static.usrfiles.com/ugd/735189_33554b18a9044b7b93475d1271f83485.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f594087dc04933bad9918a5812b228.pdf
    • https://static.usrfiles.com/ugd/b65acf_aedaeff1478f4598819e3bf46b73b6c8.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_cd54b574884a42a580bb43dbb9d5bad3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e59049d69c4b45eb975085bc52814b9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_604205606b5744b7bbbff45f4fcc0137.pdf
    • https://cdn.shopify.com/s/files/1/0438/1533/8144/files/xurarinopojedoxidob.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/3355517871.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6527/7605/files/2964203866.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/bhrashtachar_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/13229282052.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/rimujosedugufod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/apes_free_response_2018_answers.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
font_00_sfnt_off00007df3.bin
2ba6e0c4516ae528974428ab90d2fcb845e31fc6427c3681d976df34e50bf0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF3 6568 bytes
font_01_sfnt_off00008e40.bin
12e3922e74ea6cecb8a92f524f079101dfcaa7c8eaa1917b630a105a917c754e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E40 5816 bytes
font_02_sfnt_off0000a1ff.bin
975c16e4ea1d0b5c52aef91dc6125fb6e35b38a97682ebaebed97d910babfe14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FF 10652 bytes
font_03_sfnt_off0000c693.bin
7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC693 16344 bytes

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