Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a7b95e23ff5415…

MALICIOUS

PDF

41.1 KB Created: 2020-08-27 13:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11a176ec73bc15019c88a5d5da159454 SHA-1: 2903637080f8b340560b66cd022bf33b91a1f088 SHA-256: 42a7b95e23ff5415175782fbe5153d4005e169a944f3b4ffc7943206b0e37725
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.me/pify?keyword=the+four+agreements+companion+book+w', is identified as a malicious redirector. The document body references a book title, suggesting a lure to entice users to click on the embedded links.

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.me/pify?keyword=the+four+agreements+companion+book+w
    • http://files.northeastturtles.org/uploads/1/3/1/4/131407823/firizifito-buxubuxemuw.pdf
    • http://files.ericksoneducationalconsulting.com/uploads/1/3/1/8/131856491/7816088.pdf
    • http://files.quanahritchiereunion.com/uploads/1/3/1/3/131381722/8454779.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/javapazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/filipanifobeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/wexagupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/46364802940.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/saved_facebook_videos_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/biworesovuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/black_seed_oil_health_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0447/6190/7351/files/astm_standards_material_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/jaxasowugerexaxafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/69882929347.pdf
    • https://cdn.shopify.com/s/files/1/0460/9032/2084/files/guideray_gr_i_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/tevenesujefojozudile.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/faxigibowatubafujosakig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/numeros_romanos_4_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/baptism_in_the_bible.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b0.bin
4d694df35cbeca727d9d7db07641c750f618dd3f444de5682e5ae5b62b953f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B0 5644 bytes
font_01_sfnt_off000075dd.bin
f82afc7336b8956948660f5e6f0ad18963eedd367f10598ba841e1eb6761996b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 9780 bytes

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