Malicious PDF — malware analysis report

Static analysis result for SHA-256 28baffd1f816f93f…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 07:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b772ef25ef287c5182acc372ed4d4cac SHA-1: a42ed37201229d2b91e8fa047198071cc846fc39 SHA-256: 28baffd1f816f93fd0209064d6375c2b5fc730b060e54a701d969c93caacd77c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=antivirus+for+windows+7+filehippo'. This URL is presented as a lure for 'antivirus for windows 7 filehippo', suggesting a social engineering tactic to trick users into downloading or visiting a malicious site. The PDF also contains a large number of external links, many of which are hosted on Shopify, but the primary malicious indicator is the redirector.

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.cc/pify?keyword=antivirus+for+windows+7+filehippo
    • http://files.longheathchurch.org/uploads/1/3/1/4/131437576/3649276.pdf
    • http://wubiv.alexandriatalley.com/uploads/1/3/0/7/130775565/tejexexetanonot_lomudi_lobokojoxo_vatexiwes.pdf
    • http://files.rbsm.me.uk/uploads/1/3/0/7/130776072/fapomomewa_dagavu_rolixinazusos_ziresono.pdf
    • http://files.miembros-soylacasa.com/uploads/1/3/1/1/131163833/205c923758a.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/qed_beauty_in_mathematical_proof.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/74672465860.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/blank_instagram_template_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/idke_osu_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4302/0183/files/best_annotation_ipad_apple_pencil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/tesivojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/el_camino_del_guerrero_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/ribewejokafolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/dawufe.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_off00007621.bin
b3017d439293476b2467cf8fff423255773f240faf816206059291da5135333b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7621 5140 bytes
font_01_sfnt_off000087b7.bin
1b0e72e4b976e1851287f0f40ed62343098f6b88a844484e7380add579318798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 10704 bytes

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