Malicious PDF — malware analysis report

Static analysis result for SHA-256 056b6a2711d3b339…

MALICIOUS

PDF

37.8 KB Created: 2020-08-17 12:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2887274872c780e7782e49d045627b90 SHA-1: 796d3f26b6fbdaa526e4b000db2d6ebf3abef9c4 SHA-256: 056b6a2711d3b339a675e50c5c3ddcf1c13086a22136d1dda92e743a0edf7351
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, however, redirects to a malicious domain, suggesting a phishing or scam attempt. The document body itself is heavily obfuscated and contains the malicious URL, indicating an attempt to lure the user to a potentially harmful site.

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=platform+bed+frame+with+wooden+slats
    • http://files.kewosteopath.co.uk/uploads/1/3/0/8/130814874/8925865.pdf
    • http://files.ohmyrockport.com/uploads/1/3/0/9/130969448/vanido-sorijulav.pdf
    • http://nigiwer.celebratinggodscreation.org/uploads/1/3/0/8/130873826/dexitezalenorupofufi.pdf
    • http://files.oscarbaptistchurch.com/uploads/1/3/1/3/131398366/6673904.pdf
    • http://files.sarasotarockers.com/uploads/1/3/1/0/131070872/1a9430c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/67159911165.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/soluwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7798/files/storm_in_a_teacup_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/catecismo_menor_de_la_familia.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/atmosphere_shift_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5841/files/68288247637.pdf
    • https://cdn.shopify.com/s/files/1/0433/1628/1512/files/good_night_images_hd_new_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/rejotobelib.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/tibepixavelaxetutevuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/nuredusupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/e2_80_9cvision_bundle_e2_80_9d.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/android_app_source_code_zip.pdf
    • https://cdn.shopify.com/s/files/1/0445/6172/7647/files/56101693015.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_off00005434.bin
0465bdd8448a779ca45de5a6c1bbc004cd0fb4eabbc7657186bf56b1ee599b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5434 5380 bytes
font_01_sfnt_off00006661.bin
4562df1a5690b4935732a65c684e6386d6165153ddfb22f66d6b69a667e76808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6661 10620 bytes

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