Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a21020edc7ae480…

MALICIOUS

PDF

49.4 KB Created: 2020-08-12 04:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddae71fe9f0f77fc3b4cd06a524ab0c1 SHA-1: 421f680bbe899d6a55cbe9040616da951026207c SHA-256: 7a21020edc7ae480b3af8564d86bbb139c74ceb1657869fb9bcfde36dbfadd79
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=prostate+cancer+causes+pdf, which is flagged as malicious. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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=prostate+cancer+causes+pdf
    • http://tibemaluw.shopcultivateurbanrainforest.com/uploads/1/3/1/3/131398140/wetelalu.pdf
    • http://files.teachersrock16.com/uploads/1/3/1/4/131406563/53009581b9d.pdf
    • http://files.hazelcirclelenses.com/uploads/1/3/1/4/131437778/5522450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7254/4150/files/ccna_routing_and_switching_200_125_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/mepepuwiraxulemogag.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/mesimujos.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/act_guide_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/research_approach_definition_by_authors.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/49688462716.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/isospora_felis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/gafewuvejas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/moxagukisejigedasajegov.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/40009478548.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/asterix_and_obelix_complete_collection_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/karalejurixarewutuvux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3545/9738/files/saxon_algebra_2.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_off00008426.bin
0fdf9a3ec1962bcb40f65258fe8397960fe39f76670183155c5ec7d9aa2ee6ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8426 5116 bytes
font_01_sfnt_off00009593.bin
dd202ada2e83421dd257abd78423c137651a3f6a2828d2fbc085cc03cdb62432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9593 10412 bytes

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