Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21526eeba3872fb…

MALICIOUS

PDF

51.4 KB Created: 2020-09-01 08:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea45b091672e3b67c17c137d6975721 SHA-1: da65d97d9f34fc79ddcbcdcf15c41a42454dd194 SHA-256: e21526eeba3872fb38c920ff0a75ac2d35739ff21dc377233c235e9cdeec33be
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=abcd+malayalam+movie+free++hd'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded links, many of which point to Shopify domains. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the malicious URL, suggesting a lure to a malicious site.

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/wix?keyword=abcd+malayalam+movie+free++hd
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/aankhen_teri_kitni_haseen_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/67880393851.pdf
    • https://cdn.shopify.com/s/files/1/0433/8568/4124/files/arnulfo_sanchez_miranda.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/free_printable_letter_f_coloring_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/dikuvafidojej.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/aprendizaje_basado_en_proyectos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/wordscapes_answers_level_8593.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/goronawom.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_b060e602bff846ca9a72b62829ddb97f.pdf
    • https://static.usrfiles.com/ugd/b65acf_d9c1098cd63c4caba98d374db69403cf.pdf
    • https://static.usrfiles.com/ugd/cc15ef_a0064375a6a742e983a8dba4bc176234.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_2a84e61e2c7e4e8eae411eec22aeb648.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4044/files/dolinatexipune.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/acidification_of_urine.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/zazederutuzenejupi.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_off00006970.bin
9d61a985f504d4f9cc39c12e72f4002f339fceb4e1044d16c13da510d70c34ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 4976 bytes
font_01_sfnt_off00007a5a.bin
debd777ef64c9349c773f810b7d0669ad60737cafac8609f49f0e9d8b8ed78e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 10120 bytes
font_02_sfnt_off00009d3c.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3C 16164 bytes
font_03_sfnt_off0000b255.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB255 4324 bytes