Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf54f05a73a3507…

MALICIOUS

PDF

44.4 KB Created: 2020-09-03 07:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c6f858fdf494b975ae84cd88c3b3646 SHA-1: 6f8feaea215656e6897ade339a100b4441280980 SHA-256: 7cf54f05a73a35079101e8dda93f1b8a847c176d794ba17baf71fd31a1796f69
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that appears to be part of a link farm, with many Shopify-hosted PDFs. The document's content and structure suggest a phishing or scam attempt, likely using a lure related to templates to entice clicks.

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.link/wix?keyword=printable+weekly+planner+excel+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/gasezal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/wovajuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/jogomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/hindu_predictive_astrology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/nadija.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/bidewojafozob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0432/7823/7856/files/lezulebubelilidujolelufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/lufuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/bijaresasosonu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/nutuxapamerixinuzewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/sisevejikodunigugilutugo.pdf
    • https://static.usrfiles.com/ugd/b52961_539ab6c7627e4814a510f71c4a65a62b.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006284.bin
198c7af93e1c9fa82217c72a3b63fbf146e2e019f97fac44556c6d75bf2ffd70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6284 5224 bytes
font_01_sfnt_off00007438.bin
05fcb38a2aedfc0b02683858b6170dfe7820e757317aa171e8585f8a73d87f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7438 10200 bytes
font_02_sfnt_off000096e0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E0 4324 bytes

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