Malicious PDF — malware analysis report

Static analysis result for SHA-256 193e16e4f6ca09f8…

MALICIOUS

PDF

41.3 KB Created: 2020-07-28 14:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92337f0e3247e053023f34517c279825 SHA-1: 018c094e3e54f30a2b5e104794e6bebf75882072 SHA-256: 193e16e4f6ca09f801d8aafceae9a2ebb07820b5ec9bf572d91462daac6224c1
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a business email compromise (BEC) or phishing attempt, aiming to trick users into believing there are new banking instructions. The document body, though heavily obfuscated, contains text related to transferring game center data, which may be a pretext for the malicious link.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=transfer+apple+game+center+to+android
    • http://files.bbqpete.com/uploads/1/3/1/6/131637853/gezaturol.pdf
    • http://files.annshafer.com/uploads/1/3/2/7/132710491/zowij.pdf
    • http://files.markcraiggallery.com/uploads/1/3/0/8/130874587/9211409.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/sisidojinufowakotop.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/71939797949.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/ketijefebab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3244/4056/files/radivuzizeburabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/99374011060.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/61954977229.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/toxowadabijidutubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/77969382062.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/5786537764.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.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_off000064d9.bin
7ceacdc26dedb82458bb6cdf7699ceebca4ec33ebf64b7238e5606eb52070914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 5212 bytes
font_01_sfnt_off0000766d.bin
071a49874bd7cf1203690abace4a110ac6ceb426489ee4163852c586b9140f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 9800 bytes

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