Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb1830c3d3315f1…

MALICIOUS

PDF

58.4 KB Created: 2020-08-06 20:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 130108ff0f416b5da0076a0b29020380 SHA-1: 4d2e30adf8e76abea117426e2ce9a39f85435ca0 SHA-256: dfb1830c3d3315f10154f4c17c3c104b61223829eef8d0dc59eacf93a00eb144
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary URL, https://ttraff.com/pify?keyword=antioxidantes+alimentos+pdf, is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Antioxidantes alimentos pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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=antioxidantes+alimentos+pdf
    • http://files.lindseyraisa.com/uploads/1/3/2/6/132682802/kinol_fifabebimapi_sufisaxesit_dusubiv.pdf
    • http://files.rosecitypepperheads.com/uploads/1/3/2/6/132683330/0bee86f0472c29.pdf
    • http://files.sacredhuman.co.uk/uploads/1/3/1/3/131379118/muxusigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/bekijibatekuguzeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/vutasijifapuvol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/dujutamabuwojogun.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/27092690165.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/disiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/85_chevy_c10.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/the_professional_chef_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/magob.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5100/files/rarukafawaninotikimipifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/zeliwav.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/kugiwipanalofodobivona.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.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_off0000a46b.bin
889c21cfb1a7e16819a8980e85d0618a9ca834917fea72ce8da06a0ae6aceb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46B 5148 bytes
font_01_sfnt_off0000b5e8.bin
98a0dcfa2360ee092efa0d23ac58de23f847a579a72de34dc2224f3a2b1d5383		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E8 11448 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.