Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fa8c023440e31b…

MALICIOUS

PDF

33.8 KB Created: 2020-08-07 15:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00eea57f1f03addf4b43004459c0cac5 SHA-1: f5a36069504d7f859fb1ca0adc4ede6a872e1214 SHA-256: 73fa8c023440e31b69e6c6ff9f4d3cdf2d5a695c9ff671728cca246daad4a576
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many pointing to external PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector, indicating a phishing or scam attempt. The document's content and structure suggest it is part of a link farm designed to distribute malicious content or lead users to fraudulent 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.cc/pify?keyword=calgary+bus+map+pdf
    • http://files.artistscoalitionforevents.com/uploads/1/3/1/4/131407901/pejafi.pdf
    • http://files.monicasayers.com/uploads/1/3/1/0/131069987/besesosojodobidawit.pdf
    • http://files.functionalhealthcoach.com.au/uploads/1/3/2/6/132681836/2a4ad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/juvet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/windows_7_pro_oa_hp.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/wufasomejoziviri.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/oakland_athletics_2020_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/gavobelam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76106621034.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/zebelutozuful.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/makanesosesenab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/vesap.pdf
    • https://cdn.shopify.com/s/files/1/0450/3486/4798/files/kiro_7_weather.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/sabul.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/51063710467.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_off000046eb.bin
dd814a6a7f8499aca48dcd0f76a489b8125c2b98731826af3362a08d38bf344d
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EB 5508 bytes
font_01_sfnt_off0000598b.bin
100f8cba681eb631141ad87a794211fac3f41deb0f68b0c6a9ef48331782fc3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x598B 9684 bytes