Malicious PDF — malware analysis report

Static analysis result for SHA-256 928e1624fea97242…

MALICIOUS

PDF

46.5 KB Created: 2020-09-01 04:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a477f95c1ae633ce9287575db8387771 SHA-1: d7983511ded45ff4a7721f03da49af6dd4960b5b SHA-256: 928e1624fea97242995dd7765c565ac6447b92cc884f0b301b44c99ec433547a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references a product, suggesting a lure. The ML classifier also flagged this PDF as malicious. The primary attack vector appears to be a phishing attempt using a link farm to obscure the malicious destination.

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.com/wix?keyword=garnier+sheet+mask+charcoal
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/urc-_8820-_cisco.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/linafizofowasawodokefixo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8972/1496/files/allegory_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/game_seperti_ameba_pico_di_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/rulodolopijagelebed.pdf
    • https://static.usrfiles.com/ugd/1df9ea_9b694fca0a8245baa91bb7609ead81c8.pdf
    • https://static.usrfiles.com/ugd/05900a_bbf1eb70e9ee42e6b76a11ba0dd9ba56.pdf
    • https://static.usrfiles.com/ugd/4ae4db_58620220231c49fcaecd6601ad617b3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2a383a491994bdb800dbf6807dcff9c.pdf
    • https://static.usrfiles.com/ugd/37428b_f94c8d123e4c4884bf6daa4ac00ee017.pdf
    • https://static.usrfiles.com/ugd/2ca09c_c6e7f2b103cd485c8a21e66083211ae4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9fb4bbf97cd4172a2019ae9ecb25e06.pdf
    • https://static.usrfiles.com/ugd/0286dd_6c03f9619a224a50a5a8bb72d58bc33e.pdf
    • https://static.usrfiles.com/ugd/67f5f7_3b2f728ea0484d248d1e19423d56a02d.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/30563644662.pdf
    • https://cdn.shopify.com/s/files/1/0437/9512/0289/files/report_contraband_cigarettes_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/95896728762.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/pizidanovelamonos.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/
    • https://static.usrfiles.com/ugd/b8c837_e2a383a491994bdb800dbf6807dcff9c

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aae.bin
b91847faa2ff59ee4512bb1dcd5eb1641f142d705a5ef743f48edd5feb08027e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 4924 bytes
font_01_sfnt_off00007b35.bin
9905156b453bcb5f870ea782610d7c2b1c83e95a5630eb0eb17be4e6cc1ca492
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B35 10392 bytes
font_02_sfnt_off00009eae.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAE 4324 bytes