Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ee4dc00b2ce9ab…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 01:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09314c8150c8931460fdb5bd15adaa8d SHA-1: 358339b33261c235326ed759f5235983a386d540 SHA-256: e3ee4dc00b2ce9ab694b784c7d1fedb883cb42a0e6c4c928857196a81a504ae5
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a high number of embedded links, with one specifically identified as a redirector to known malicious infrastructure. The document body contains a mix of seemingly unrelated text and the malicious URL, suggesting a lure to trick users into clicking. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=eminem+lets+get+down+to+business+lyrics
    • https://static.usrfiles.com/ugd/b8c837_c44405b3f47f411096c8036deed1dd57.pdf
    • https://static.usrfiles.com/ugd/99965f_17854ac6209347b7ac974267ac5bf2da.pdf
    • https://static.usrfiles.com/ugd/cf14a4_b922b59760be4c57b3390c845e9e76a0.pdf
    • https://static.usrfiles.com/ugd/3eed2b_83f8ce609d1e443b81e560db926b7e9e.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/balenciaga_logo_font.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/13044687805.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/maybank_personal_loan.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/tinisutuwibikukam.pdf
    • https://cdn.shopify.com/s/files/1/0451/4234/3833/files/les_adjectifs_numraux_cardinaux_et_ordinaux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/lexum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/roserolipozedasanodeledob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/sims_3_torrenty.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/1122750491.pdf
    • https://cdn.shopify.com/s/files/1/0444/3032/7975/files/autodesk_inventor_2020_handbuch.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064bf.bin
7cfc6b94884dbd95e66e67fb7ea195623e112b3798ec1bd1582146d53400e774
pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 5340 bytes
font_01_sfnt_off000076e6.bin
4303c9b65c62de9dae36e64e8a7594c8927f2a361314e1ea4be4e815ffbbf171
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 9996 bytes