Malicious PDF — malware analysis report

Static analysis result for SHA-256 027050726e5a39ba…

MALICIOUS

PDF

58.2 KB Created: 2020-08-08 12:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 340b55418532b3d8c48f6001f6a61ca7 SHA-1: ca52888dc15195889fbf1799c509b209b71c22ae SHA-256: 027050726e5a39ba161f805a6162ca8c7dfcf14c5e67dbbab191d9e9843dd548
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=tabla+alimentos+ricos+en+hierro+pdf', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution.

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=tabla+alimentos+ricos+en+hierro+pdf
    • http://files.long-jewelers.com/uploads/1/3/0/9/130969855/8628816.pdf
    • http://files.lesliemcgeaghhypnosis.com/uploads/1/3/2/6/132695445/6947614.pdf
    • http://files.yukonenvirothon.com/uploads/1/3/1/8/131856382/dopisuwir_vimagovivura_nazusagetabufu_pawigav.pdf
    • http://vuvoka.sheheard.org/uploads/1/3/1/6/131606289/0145a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/midufodasolofuderugonu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/dofogudum.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/jumojebowemazupiwudepuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/75514623000.pdf
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/vobuserumazerutisazelegor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/71779165673.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/wonderlic_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/go_ask_alice_beatrice_sparks.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2417/files/ginejipebakazajedavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/iphone_5_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0433/0700/8168/files/amigdalitis_bacteriana_aguda.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/44399285842.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_off0000a286.bin
b1c66510e3eb910614e580efffd30c39f2b633102e27dedef5c21442728de462		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA286 5484 bytes
font_01_sfnt_off0000b4fb.bin
8e5e5824035080c74eda099e68f459f59ccb4383b7ae40527aa6250865be4254		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FB 11400 bytes

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