Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b29c3c0951d2d82…

MALICIOUS

PDF

86.3 KB Created: 2020-08-17 14:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc7e10d267f62aaddae4180c05ebf6c1 SHA-1: 691c8b04ee41636e6335c34ad657f381327d156f SHA-256: 3b29c3c0951d2d82ea907c0252027cc2ba5651a7c39123c5194919c167252971
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to distribute content or traffic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=bart+simpson+image', is the primary indicator of malicious intent, likely serving as a lure or a redirect to further malicious content.

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=bart+simpson+image
    • http://mikiw.dreamsupercars.net/uploads/1/3/0/7/130739811/8693856.pdf
    • http://ximil.studentworshipcollective.com/uploads/1/3/1/6/131637136/c9649bd692614.pdf
    • http://files.makelifehd.org/uploads/1/3/1/6/131636907/9193939.pdf
    • http://fenufu.neededmag.com/uploads/1/3/1/6/131637814/0570071d7dc0f3.pdf
    • http://files.richmondhillathleticproject.com/uploads/1/3/0/9/130969305/nomotejig-sadaxiroji-gutasegif.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/35655113539.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/59550627992.pdf
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/promissory_note_format.pdf
    • https://cdn.shopify.com/s/files/1/0444/5070/9671/files/resuscitation_council_guidelines_anaphylaxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/71588706669.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/fuvakagatulosikufipasifur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/plant_systematics_simpson__1_227.pdf
    • https://cdn.shopify.com/s/files/1/0439/2606/1224/files/70616802558.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/dataflow_report_request.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/guniwun.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/38238769952.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_off0001164c.bin
1f51480dfcc438e0ffdbdeb6b0f6503eb85cf0df3db53e47bbc092944ddc2b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 5156 bytes
font_01_sfnt_off000127ba.bin
003b0aa8b7a7051079b61e910f15c19d9b9c1600d4c1310bbb4f10ec5b3d54e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127BA 10616 bytes

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