Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e3854280b9dd6a…

MALICIOUS

PDF

47.3 KB Created: 2020-08-03 00:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0f2baf9e159bafdb0eb8a24b10b666 SHA-1: cff119c331714654abcf4e65a4afddfd0a7a0f62 SHA-256: 00e3854280b9dd6af6a013d41a1488ab5987502cd841f8a5a63b369870837e94
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of links to known malicious infrastructure. The document body contains obfuscated text and a URL that appears to be part of the redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=radiata+stories+ps4
    • http://files.sipanddrift.com/uploads/1/3/0/8/130814382/sogokewovilajuk.pdf
    • http://files.fingerhutpastries.com/uploads/1/3/2/6/132695732/kuline-junaxi.pdf
    • http://files.pleikuab.com/uploads/1/3/0/8/130813317/batozevu_numev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/fapomorupudokojiwove.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/71569498538.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/34089253937.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/the_negative_trait_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/petudo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/gepalunutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/birirufodunaxukaxowopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/fipizurusapake.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/lugunudabezunowom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/29835095956.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/34610306710.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/jovupowubapekavif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/65042748619.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005257.bin
ac66ddecb1889e99694234647e4a1e19b6174440e696c9ee44c6cb9711419273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5257 3312 bytes
font_01_sfnt_off00005e38.bin
e648004c71ec470a1b25bb2424c027d2abe2875d5be47f9b3b081c2274086393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 5016 bytes
font_02_sfnt_off00006f54.bin
538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 6640 bytes
font_03_sfnt_off000080f2.bin
aa1583c3d6e9e2d46fd69977b607b9f717c28ef50b491de02209247714ee80a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F2 10296 bytes
font_04_sfnt_off0000a426.bin
ee8afa51e50492bdf4d25b6b01818d2021856a0eb5271b70f188e6d094f25891		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA426 2832 bytes

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