Malicious PDF — malware analysis report

Static analysis result for SHA-256 0677f1a4e98d64d1…

MALICIOUS

PDF

41.0 KB Created: 2020-08-25 10:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebecf3ea3dd05a89326908843662ceb3 SHA-1: 1d8a0d9dc3418477deb1bccf20b642a57cfc1a31 SHA-256: 0677f1a4e98d64d11e6d9e0b1ee4ebd6555def818a9a987292508ffaee22bd63
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'From dusk till dawn netflix parents guide', likely to entice users to click on the embedded links. The presence of a link farm and a malicious redirector indicates an attempt to lead users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=from+dusk+till+dawn+netflix+parents+guide
    • http://files.pack216mcs.com/uploads/1/3/0/9/130969708/delosugev-rajijen.pdf
    • http://files.vetcliniceh.com/uploads/1/3/0/9/130969572/daxevorevixeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2860/9186/files/ias_36_practice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/43153689149.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/79412681409.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/14283833080.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/toastmasters_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/lugojogabobunemelipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/kotejavifavaxarinobipis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/26199206053.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_off00005f9b.bin
195c0c9aa3f123ff0f35de48a94f5d88c91717534593e968d66c9fa2905eb020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9B 5540 bytes
font_01_sfnt_off0000727d.bin
bf2b0e2b168e02ab7445c0c450a65814e8700bb5669177b2bce43bd1691fcc78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 10332 bytes

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