Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c502274e817831…

MALICIOUS

PDF

43.9 KB Created: 2020-08-25 10:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e08bffb383540a264ba123fd8a84bee5 SHA-1: a0357c8e87bee464afc41c69faf6cfd9750ec9db SHA-256: 01c502274e8178310334d99f12cdc9c861b18d717d04ce9a4c19fdcf581df81e
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'application for leave form' and includes a call-to-action phrase. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=application+for+leave+form+csc
    • http://files.knzafm.com/uploads/1/3/2/6/132695321/fapubefurusezo-fijul.pdf
    • http://files.homeartscontentandcopywriting.com/uploads/1/3/1/8/131858540/vebibuwugodow.pdf
    • http://files.daydreamscakecompany.com/uploads/1/3/0/7/130739251/370294427f1e1.pdf
    • http://files.lembixlab.net/uploads/1/3/0/7/130739686/3978710.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/5070/9671/files/wamaxolunutavofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/49983572603.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/57151528923.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/gintama_episode_guide_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/carburizing_heat_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/irritant_diaper_dermatitis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/73231361864.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_off00006ed2.bin
e6fc365f1e4b8df8e1adb64197811e1779bd3594815d4963b1d4560b5150f3df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED2 5208 bytes
font_01_sfnt_off00008071.bin
614c18463886791cbbb13efb50a4d42e00d16a82b3ba506606247ba494a3c67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8071 10136 bytes

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