Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac1f5e772ae1a12…

MALICIOUS

PDF

42.6 KB Created: 2020-08-12 14:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b45441e111ebb3ad70f640ea244cf839 SHA-1: 7b99f9d8afe304df26fbc5b058c3ac9678c3fffb SHA-256: 6ac1f5e772ae1a123b4d2e8233e15b7148b8df2309c914d951856cd2fa3c6e2b
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify and appear to be part of an SEO link farm. One prominent link, 'https://ttraff.cc/pify?keyword=anatomy+and+physiology+handbook+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to download or view content, which ultimately leads to malicious infrastructure. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

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.cc/pify?keyword=anatomy+and+physiology+handbook+pdf
    • http://files.adirondacktrailsandlodging.org/uploads/1/3/0/7/130740298/9ebf465a9067.pdf
    • http://karuna.atsqueobowmen.com/uploads/1/3/0/7/130776433/d9918d5abd7.pdf
    • http://files.laurieleegeorgescu.com/uploads/1/3/0/9/130969001/2795399.pdf
    • http://files.sapphireimagery.com/uploads/1/3/1/1/131164479/vixisirupupamoguse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/75179681184.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/kepujodajeriluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/breast_cancer_ribbon.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/67507999378.pdf
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/56502841971.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/69752458482.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/electrocardiograma_infarto.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/bat_mitzvah_speech.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/33953272813.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/xaxadobolawidoxexajagoxed.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/witumedukenekobafobimava.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/accounting_information_system_james_hall_book.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_off00006489.bin
844d4d14b8ba7940e0514b085756b567c5a58cab30edfe97311d6721a2c2f88d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 5656 bytes
font_01_sfnt_off000077a3.bin
15e04e13fb6652a98cf4471f507ca1d840b0597774bf13334a3907f60c214f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 10800 bytes

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