Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2eaab29c4576f09…

MALICIOUS

PDF

83.5 KB Created: 2020-09-09 13:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5885e56a9ac109220727b3714f909994 SHA-1: 596ab4066ab54648084daff1f8f8e2c0f71ef398 SHA-256: d2eaab29c4576f09002a4dd1d61ebde41d44bd462710ba190cc53ff74cd4039d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=wpf+binding+stringformat.

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=wpf+binding+stringformat
    • https://static.usrfiles.com/ugd/760a88_f81df53eb66d4568855688df3cc4cb24.pdf
    • https://static.usrfiles.com/ugd/576447_53934a072c7046909a3f557be15ba915.pdf
    • https://static.usrfiles.com/ugd/eb4c03_cd04935b653f4597a3f56ef51c158ada.pdf
    • https://cdn.shopify.com/s/files/1/0462/7457/6533/files/27181077604.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8950/files/muvotelazaguxevezuvawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1062/files/baka_to_test_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0462/5370/3317/files/auto_sync_contacts_gmail_android.pdf
    • https://static.usrfiles.com/ugd/a31856_1aedd0517f714a359096a9a16f44b71c.pdf
    • https://static.usrfiles.com/ugd/384ea4_15cd1bb29fbb4a55b103ef41198f760d.pdf
    • https://static.usrfiles.com/ugd/f08e01_47f533a230a542f6b9d8f5def5b2d1f4.pdf
    • https://static.usrfiles.com/ugd/91e123_05a20f34c89348ffaf42c27a1cb81bfa.pdf
    • https://static.usrfiles.com/ugd/4725f1_2982266473a14cad8ea0e711d47b71cf.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/xelawizowum.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/luwupisetegusipem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/jobulinoramanenodebevibi.pdf
    • https://cdn.shopify.com/s/files/1/0461/6129/7560/files/broadsheet_newspaper_writing_style.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/xemutasijojarexitufip.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_off000093d1.bin
ac4a3208bc27150579fc0403baf04881ed230beac6ad66bdf3060b3b52888955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D1 28112 bytes
font_01_sfnt_off0000e317.bin
bb97a40ecc114a40752024fce5e44b0d1f8e18c37a37093363398d90019cff1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 5480 bytes
font_02_sfnt_off0000f5ac.bin
a277a3ab3976878fe7e84ee1f1ccf23e9ec7aeb86640af47c8afbe14db0d01d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 17044 bytes
font_03_sfnt_off00012b23.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B23 16204 bytes

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