Malicious PDF — malware analysis report

Static analysis result for SHA-256 635e16fe43c91d8b…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 22:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bcb06f1480fef6f41a1588902eb326e SHA-1: f5eaeb7e107114edb9e8fdd166b0422918a3df42 SHA-256: 635e16fe43c91d8b071cb91a659d09b379dc60526bd0bd9b3f87c5f8c789b269
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=agrarian+skies+map++single+player'. This indicates the document is likely designed to redirect users to malicious sites, potentially for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=agrarian+skies+map++single+player
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/mickeys_caps_answers_donkey.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/wordpress_permissions_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/math_in_the_modern_world.pdf
    • https://cdn.shopify.com/s/files/1/0450/3198/1220/files/anatomie_de_l_appareil_digestif_humain.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/xetafaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/antiepileptic_drugs_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/lines_composed_above_tintern_abbey.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/91882330993.pdf
    • https://static.usrfiles.com/ugd/b8c837_249d48c19f4e44d79ddff24efe81c97d.pdf
    • https://static.usrfiles.com/ugd/0d2908_10801a1b47d84c0cb4a4063f4df3d270.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/lorinezisebarali.pdf
    • https://cdn.shopify.com/s/files/1/0431/8566/8259/files/zutatodojusomurukuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/rationalizing_denominators_with_radicals_worksheet.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005599.bin
2b0959af10e76e0cae16e3d9d1b58b9ec223f798320ca685bc1543429ddcafd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5599 5292 bytes
font_01_sfnt_off00006798.bin
7896547450142cea3b07af8efa93a3b01e1b751a7d75b1a351d8ff11ab6d23ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6798 10164 bytes

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