Malicious PDF — malware analysis report

Static analysis result for SHA-256 03707091ff51a8f0…

MALICIOUS

PDF

50.2 KB Created: 2020-07-31 09:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d94825278a303f2119172a5597cf6ded SHA-1: 9820d201e9732f4c696058e7a88942a6b237527c SHA-256: 03707091ff51a8f09a9096af97f55c7b3665d89eb43981bd99fd29b4ec16abb5
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'merit list 2020 pdf'. The presence of a download button heuristic further supports a malicious download or redirection workflow. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=gujacpc.+nic.+in+merit+list+2020+pdf
    • http://files.invergowriehomestead.com/uploads/1/3/2/6/132682897/rebodujak.pdf
    • http://files.wildconnectionart.com/uploads/1/3/0/7/130775998/funifabake.pdf
    • http://files.potomacprojectservices.com/uploads/1/3/0/7/130776164/lasonupekoxe.pdf
    • http://files.paulmcafee.com/uploads/1/3/1/4/131454345/440d63533a9.pdf
    • http://files.thecactusroom.org/uploads/1/3/1/6/131637271/nebefetike-biginenijan-xodipejopox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/54250800874.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/86925409870.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/92202560224.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/nukexijonogatoretad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/zumatitojedubitirobunew.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/nalukudusuvos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/xudapel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/borilowekupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/tukiporon.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/fuzememufasaduzajogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/82861144818.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_off000080f0.bin
6219b710f3c4ff11ef5c21bf20ebcad349ac176a932114d27527cc4fb2c0972d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F0 5484 bytes
font_01_sfnt_off00009386.bin
987f6993fde13775a2124dfa2898933c0ed52ae663a48711112c232b13299c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9386 12464 bytes

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